diff --git a/src/app/+home-page/home-news/themes/home-news.component.mantis.html b/src/app/+home-page/home-news/themes/home-news.component.mantis.html
index fe5009363c16d2fc0657380fe26e30a42781ce66..156ff1e5ef11d8b9635bda6c36067435e81e8003 100644
--- a/src/app/+home-page/home-news/themes/home-news.component.mantis.html
+++ b/src/app/+home-page/home-news/themes/home-news.component.mantis.html
@@ -1,21 +1,20 @@
-<div class="jumbotron jumbotron-fluid">
-    <div class="d-flex flex-wrap">
-        <div>
-            <h1 class="display-3">DSpace 7</h1>
-            <p class="lead">DSpace is the world leading open source repository platform that enables
-                organisations to:</p>
+<div class="background-image">
+    <div class="container">
+        <div class="jumbotron jumbotron-fluid">
+            <div class="d-flex flex-wrap">
+                <div>
+                    <h1 class="display-3">DSpace 7</h1>
+                    <p class="lead">DSpace is the world leading open source repository platform that enables organisations to:</p>
+                </div>
+            </div>
+            <ul>
+                <li>easily ingest documents, audio, video, datasets and their corresponding Dublin Core metadata
+                </li>
+                <li>open up this content to local and global audiences, thanks to the OAI-PMH interface and Google Scholar optimizations
+                </li>
+                <li>issue permanent urls and trustworthy identifiers, including optional integrations with handle.net and DataCite DOI</li>
+            </ul>
         </div>
     </div>
-    <ul>
-        <li>easily ingest documents, audio, video, datasets and their corresponding Dublin Core
-            metadata
-        </li>
-        <li>open up this content to local and global audiences, thanks to the OAI-PMH interface and
-            Google Scholar optimizations
-        </li>
-        <li>issue permanent urls and trustworthy identifiers, including optional integrations with
-            handle.net and DataCite DOI
-        </li>
-    </ul>
-  <p>Join an international community of <A HREF="https://wiki.duraspace.org/display/DSPACE/DSpace+Positioning" TARGET="_NEW">leading institutions using DSpace</A>.</p>
-</div>
+    <small class="credits">Photo by <a href="https://www.pexels.com/@inspiredimages">Anthony</a></small>
+</div>
\ No newline at end of file
diff --git a/src/app/+home-page/home-news/themes/home-news.component.mantis.scss b/src/app/+home-page/home-news/themes/home-news.component.mantis.scss
index a07f70fac5f4b6094d789ed1685ebd4e080e2c61..740c0b29e84ddca98316ca97cabe8787b8f929d4 100644
--- a/src/app/+home-page/home-news/themes/home-news.component.mantis.scss
+++ b/src/app/+home-page/home-news/themes/home-news.component.mantis.scss
@@ -1,19 +1,58 @@
 @import '../../../../styles/variables.scss';
-@import '../../../../styles/mixins.scss';
 
-:host-context(.mantis) {
-  $home-news-link-color: $green !default;
-  $home-news-link-color: darken($home-news-link-color, 15%) !default;
+:host-context(.preview-release) {
+    div.background-image {
+        color: white;
+        background-color: #2e80a3;
+        position: relative;
+        background-position-y: -200px;
+        background-image: url('/assets/images/banner.jpg');
+        background-size: cover;
+        @media screen and (max-width: map-get($grid-breakpoints, lg)) {
+            background-position-y: 0;
+        }
+
+        .container {
+            position: relative;
+            text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.6);
+            &:before, &:after {
+                content: '';
+                display: block;
+                width: $banner-background-gradient-width;
+                height: 100%;
+                top: 0;
+                position: absolute;
+            }
+
+            &:before {
+                background: linear-gradient(to left, $banner-text-background, transparent);
+                left: -$banner-background-gradient-width;
+
+            }
+
+            &:after {
+                background: linear-gradient(to right, $banner-text-background, transparent);
+                right: -$banner-background-gradient-width;
+            }
+
+            background-color: $banner-text-background;
+
+            .jumbotron {
+                background-color: transparent;
+            }
+
+        }
 
-    .jumbotron {
-        background-color: transparent;
-    }
 
-  a {
-    color: $home-news-link-color;
+        small.credits {
+            a {
+                color: inherit;
+            }
+            opacity: 0.3;
+            position: absolute;
+            right: 5px;
+            bottom: 0;
+        }
 
-    @include hover {
-      color: $home-news-link-color;
     }
-  }
 }
diff --git a/src/app/+home-page/home-news/themes/home-news.component.preview-release.html b/src/app/+home-page/home-news/themes/home-news.component.preview-release.html
deleted file mode 100644
index 156ff1e5ef11d8b9635bda6c36067435e81e8003..0000000000000000000000000000000000000000
--- a/src/app/+home-page/home-news/themes/home-news.component.preview-release.html
+++ /dev/null
@@ -1,20 +0,0 @@
-<div class="background-image">
-    <div class="container">
-        <div class="jumbotron jumbotron-fluid">
-            <div class="d-flex flex-wrap">
-                <div>
-                    <h1 class="display-3">DSpace 7</h1>
-                    <p class="lead">DSpace is the world leading open source repository platform that enables organisations to:</p>
-                </div>
-            </div>
-            <ul>
-                <li>easily ingest documents, audio, video, datasets and their corresponding Dublin Core metadata
-                </li>
-                <li>open up this content to local and global audiences, thanks to the OAI-PMH interface and Google Scholar optimizations
-                </li>
-                <li>issue permanent urls and trustworthy identifiers, including optional integrations with handle.net and DataCite DOI</li>
-            </ul>
-        </div>
-    </div>
-    <small class="credits">Photo by <a href="https://www.pexels.com/@inspiredimages">Anthony</a></small>
-</div>
\ No newline at end of file
diff --git a/src/app/+home-page/home-news/themes/home-news.component.preview-release.scss b/src/app/+home-page/home-news/themes/home-news.component.preview-release.scss
deleted file mode 100644
index 7e85366bede0e9d16995b618015a90820cb30463..0000000000000000000000000000000000000000
--- a/src/app/+home-page/home-news/themes/home-news.component.preview-release.scss
+++ /dev/null
@@ -1,58 +0,0 @@
-@import '../../../../styles/variables.scss';
-
-:host-context(.preview-release) {
-    div.background-image {
-        color: white;
-        background-color: #2e80a3;
-        position: relative;
-        background-position-y: -200px;
-        background-image: url('/assets/images/banner.jpg');
-        background-size: cover;
-        @media screen and (max-width: map-get($grid-breakpoints, lg)) {
-            background-position-y: 0;
-        }
-
-        .container {
-            position: relative;
-            text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.6);
-            &:before, &:after {
-                content: '';
-                display: block;
-                width: $banner-background-gradient-width;
-                height: 100%;
-                top: 0;
-                position: absolute;
-            }
-
-            &:before {
-                background: linear-gradient(to left, $banner-text-background, transparent);
-                left: -$banner-background-gradient-width;
-
-            }
-
-            &:after {
-                background: linear-gradient(to right, $banner-text-background, transparent);
-                right: -$banner-background-gradient-width;
-            }
-
-            background-color: $banner-text-background;
-
-            .jumbotron {
-                background-color: transparent;
-            }
-
-        }
-
-
-        small.credits {
-            a {
-                color: inherit;
-            }
-            opacity: 0.3;
-            position: absolute;
-            right: 5px;
-            bottom: 0;
-        }
-
-    }
-}
\ No newline at end of file
diff --git a/src/app/+home-page/themes/home-page.component.mantis.html b/src/app/+home-page/themes/home-page.component.mantis.html
index 03c89139cf4f38425fd3dcf49c147732ba553386..573cc8ecb453d183fdeb56d0ebd210cff34baecc 100644
--- a/src/app/+home-page/themes/home-page.component.mantis.html
+++ b/src/app/+home-page/themes/home-page.component.mantis.html
@@ -1,10 +1,5 @@
-<div class="background-image">
-    <div class="container">
-        <ds-home-news></ds-home-news>
-        <ds-search-form class="d-block pb-3" [inPlaceSearch]="false" [large]="true" [brandColor]="'success'"></ds-search-form>
-    </div>
-    <small class="credits">Photo by <a href="https://www.pexels.com/@inspiredimages">@inspiredimages</a></small>
-</div>
-<div class="container pt-3">
-    <ds-top-level-community-list></ds-top-level-community-list>
+<ds-home-news></ds-home-news>
+<div class="container">
+  <ds-search-form class="d-block pt-4 pb-3"></ds-search-form>
+  <ds-top-level-community-list></ds-top-level-community-list>
 </div>
diff --git a/src/app/+home-page/themes/home-page.component.preview-release.html b/src/app/+home-page/themes/home-page.component.preview-release.html
deleted file mode 100644
index 573cc8ecb453d183fdeb56d0ebd210cff34baecc..0000000000000000000000000000000000000000
--- a/src/app/+home-page/themes/home-page.component.preview-release.html
+++ /dev/null
@@ -1,5 +0,0 @@
-<ds-home-news></ds-home-news>
-<div class="container">
-  <ds-search-form class="d-block pt-4 pb-3"></ds-search-form>
-  <ds-top-level-community-list></ds-top-level-community-list>
-</div>
diff --git a/src/app/+home-page/themes/home-page.component.preview-release.scss b/src/app/+home-page/themes/home-page.component.preview-release.scss
deleted file mode 100644
index ea13e0565ee4eeb3f84f23591fee0a0159bb75d4..0000000000000000000000000000000000000000
--- a/src/app/+home-page/themes/home-page.component.preview-release.scss
+++ /dev/null
@@ -1,3 +0,0 @@
-:host-context(.preview-release) {
-
-}
\ No newline at end of file
diff --git a/src/app/+search-page/search-filters/search-filter/search-range-filter/themes/search-range-filter.component.scss b/src/app/+search-page/search-filters/search-filter/search-range-filter/themes/search-range-filter.component.scss
deleted file mode 100644
index 28421b0f6df7603d9ba50ff5530d8696493f2eba..0000000000000000000000000000000000000000
--- a/src/app/+search-page/search-filters/search-filter/search-range-filter/themes/search-range-filter.component.scss
+++ /dev/null
@@ -1,7 +0,0 @@
-@import '../../../../../../styles/variables.scss';
-
-:host-context(.preview-release) {
-    ::ng-deep .noUi-connect {
-        background: $info;
-    }
-}
\ No newline at end of file
diff --git a/src/app/+search-page/search-filters/search-filter/themes/search-filter.component.mantis.html b/src/app/+search-page/search-filters/search-filter/themes/search-filter.component.mantis.html
index b03f9969750b68ab7f062c6a416a30fecf75776d..a41a346ef7cde6e206282791fa02c5915678bcc9 100644
--- a/src/app/+search-page/search-filters/search-filter/themes/search-filter.component.mantis.html
+++ b/src/app/+search-page/search-filters/search-filter/themes/search-filter.component.mantis.html
@@ -2,6 +2,6 @@
     <div (click)="toggle()" class="filter-name"><h5 class="d-inline-block mb-0">{{'search.filters.filter.' + filter.name + '.head'| translate}}</h5> <span class="filter-toggle fas float-right text-info"
                                                                       [ngClass]="(collapsed$ | async) ? 'fa-caret-down' : 'fa-caret-up'"></span></div>
     <div [@slide]="(collapsed$ | async) ? 'collapsed' : 'expanded'"  (@slide.start)="startSlide($event)" (@slide.done)="finishSlide($event)" class="search-filter-wrapper" [ngClass]="{'closed' : closed}">
-        <ds-search-facet-filter-wrapper [filterConfig]="filter" [inPlaceSearch]="inPlaceSearch"></ds-search-facet-filter-wrapper>
+        <ds-search-facet-filter-wrapper [filterConfig]="filter"></ds-search-facet-filter-wrapper>
     </div>
 </div>
\ No newline at end of file
diff --git a/src/app/+search-page/search-filters/search-filter/themes/search-filter.component.preview-release.html b/src/app/+search-page/search-filters/search-filter/themes/search-filter.component.preview-release.html
deleted file mode 100644
index a41a346ef7cde6e206282791fa02c5915678bcc9..0000000000000000000000000000000000000000
--- a/src/app/+search-page/search-filters/search-filter/themes/search-filter.component.preview-release.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<div class="facet-filter d-block mb-3 px-3 py-2" *ngIf="active$ | async">
-    <div (click)="toggle()" class="filter-name"><h5 class="d-inline-block mb-0">{{'search.filters.filter.' + filter.name + '.head'| translate}}</h5> <span class="filter-toggle fas float-right text-info"
-                                                                      [ngClass]="(collapsed$ | async) ? 'fa-caret-down' : 'fa-caret-up'"></span></div>
-    <div [@slide]="(collapsed$ | async) ? 'collapsed' : 'expanded'"  (@slide.start)="startSlide($event)" (@slide.done)="finishSlide($event)" class="search-filter-wrapper" [ngClass]="{'closed' : closed}">
-        <ds-search-facet-filter-wrapper [filterConfig]="filter"></ds-search-facet-filter-wrapper>
-    </div>
-</div>
\ No newline at end of file
diff --git a/src/app/+search-page/search-filters/search-filter/themes/search-filter.component.preview-release.scss b/src/app/+search-page/search-filters/search-filter/themes/search-filter.component.preview-release.scss
deleted file mode 100644
index 30923e721f876d2a30f47ab52803505d8c5f442a..0000000000000000000000000000000000000000
--- a/src/app/+search-page/search-filters/search-filter/themes/search-filter.component.preview-release.scss
+++ /dev/null
@@ -1,11 +0,0 @@
-@import '../../../../../styles/variables.scss';
-@import '../../../../../styles/mixins.scss';
-
-:host-context(.preview-release) .facet-filter {
-    background-color: map-get($theme-colors, light);
-    border-radius: $border-radius;
-
-    h5 {
-       font-size: 1.1rem
-    }
-}
diff --git a/src/app/+search-page/search-filters/themes/search-filters.component.mantis.html b/src/app/+search-page/search-filters/themes/search-filters.component.mantis.html
index 936bfbe7b1ee33903098a466a2fa0410a0148981..ea68c814094aab3a49eac9dba350c44624e30f3e 100644
--- a/src/app/+search-page/search-filters/themes/search-filters.component.mantis.html
+++ b/src/app/+search-page/search-filters/themes/search-filters.component.mantis.html
@@ -1,7 +1,7 @@
 <h3>{{"search.filters.head" | translate}}</h3>
 <div *ngIf="(filters | async)?.hasSucceeded">
     <div *ngFor="let filter of (filters | async)?.payload">
-        <ds-search-filter [filter]="filter" [inPlaceSearch]="inPlaceSearch"></ds-search-filter>
+        <ds-search-filter [filter]="filter"></ds-search-filter>
     </div>
 </div>
-<a class="btn btn-primary" [routerLink]="[getSearchLink()]" [queryParams]="clearParams | async" queryParamsHandling="merge" role="button">{{"search.filters.reset" | translate}}</a>
+<a class="btn btn-primary" [routerLink]="[getSearchLink()]" [queryParams]="clearParams | async" queryParamsHandling="merge" role="button">{{"search.filters.reset" | translate}}</a>
\ No newline at end of file
diff --git a/src/app/+search-page/search-filters/themes/search-filters.component.preview-release.html b/src/app/+search-page/search-filters/themes/search-filters.component.preview-release.html
deleted file mode 100644
index ea68c814094aab3a49eac9dba350c44624e30f3e..0000000000000000000000000000000000000000
--- a/src/app/+search-page/search-filters/themes/search-filters.component.preview-release.html
+++ /dev/null
@@ -1,7 +0,0 @@
-<h3>{{"search.filters.head" | translate}}</h3>
-<div *ngIf="(filters | async)?.hasSucceeded">
-    <div *ngFor="let filter of (filters | async)?.payload">
-        <ds-search-filter [filter]="filter"></ds-search-filter>
-    </div>
-</div>
-<a class="btn btn-primary" [routerLink]="[getSearchLink()]" [queryParams]="clearParams | async" queryParamsHandling="merge" role="button">{{"search.filters.reset" | translate}}</a>
\ No newline at end of file
diff --git a/src/app/+search-page/search-settings/themes/search-settings.component.preview-release.html b/src/app/+search-page/search-settings/themes/search-settings.component.preview-release.html
deleted file mode 100644
index 1321ced928faf8525ed8e33b24ee3e07c8fb5c42..0000000000000000000000000000000000000000
--- a/src/app/+search-page/search-settings/themes/search-settings.component.preview-release.html
+++ /dev/null
@@ -1,24 +0,0 @@
-<ng-container *ngVar="(searchOptions$ | async) as config">
-    <h3>{{ 'search.sidebar.settings.title' | translate}}</h3>
-    <div *ngIf="config?.sort" class="setting-option result-order-settings mb-3 px-3 py-2">
-    <h5 class="mb-0">{{ 'search.sidebar.settings.sort-by' | translate}}</h5>
-    <select class="form-control my-2" (change)="reloadOrder($event)">
-        <option *ngFor="let sortOption of searchOptionPossibilities"
-                [value]="sortOption.field + ',' + sortOption.direction.toString()"
-                [selected]="sortOption.field === config?.sort.field && sortOption.direction === (config?.sort.direction)? 'selected': null">
-            {{'sorting.' + sortOption.field + '.' + sortOption.direction | translate}}
-        </option>
-    </select>
-    </div>
-
-    <div class="setting-option page-size-settings mb-3 px-3 py-2">
-        <h5 class="mb-0">{{ 'search.sidebar.settings.rpp' | translate}}</h5>
-        <select class="form-control my-2" (change)="reloadRPP($event)">
-            <option *ngFor="let pageSizeOption of config?.pagination.pageSizeOptions"
-                    [value]="pageSizeOption"
-                    [selected]="pageSizeOption === +config?.pagination.pageSize ? 'selected': null">
-                {{pageSizeOption}}
-            </option>
-        </select>
-    </div>
-</ng-container>
\ No newline at end of file
diff --git a/src/app/+search-page/search-settings/themes/search-settings.component.preview-release.scss b/src/app/+search-page/search-settings/themes/search-settings.component.preview-release.scss
deleted file mode 100644
index 72b3de93b1d015b9aa9d6230e3fd6a70168c5862..0000000000000000000000000000000000000000
--- a/src/app/+search-page/search-settings/themes/search-settings.component.preview-release.scss
+++ /dev/null
@@ -1,10 +0,0 @@
-@import '../../../../styles/variables.scss';
-
-:host-context(.preview-release) .setting-option {
-  background-color: map-get($theme-colors, light);
-  border-radius: $border-radius;
-
-  h5 {
-    font-size: 1.1rem
-  }
-}
diff --git a/src/app/app.component.html b/src/app/app.component.html
index 5ef01e921ae158d30aea942143b2455eae5ff3bb..e368a5ab6bfc5768e2c50393c6d8a8f8acb0e1e0 100644
--- a/src/app/app.component.html
+++ b/src/app/app.component.html
@@ -1,4 +1,4 @@
-<div class="outer-wrapper preview-release">
+<div class="outer-wrapper mantis">
     <ds-admin-sidebar></ds-admin-sidebar>
     <div class="inner-wrapper"  [@slideSidebarPadding]="{
      value: (!(sidebarVisible | async) ? 'hidden' : (slideSidebarOver | async) ? 'shown' : 'expanded'),
diff --git a/src/app/header/themes/header.component.preview-release.scss b/src/app/header/themes/header.component.preview-release.scss
deleted file mode 100644
index 52bf342fabb88ecf141d9abc519c95620b953925..0000000000000000000000000000000000000000
--- a/src/app/header/themes/header.component.preview-release.scss
+++ /dev/null
@@ -1,7 +0,0 @@
-@import '../../../styles/variables.scss';
-
-:host-context(.preview-release) {
-    ::ng-deep a {
-        //color: $dark;
-    }
-}
\ No newline at end of file
diff --git a/src/app/navbar/themes/navbar.component.preview-release.html b/src/app/navbar/themes/navbar.component.preview-release.html
deleted file mode 100644
index d06eceb22235606726c604a3c43655b056fd0c48..0000000000000000000000000000000000000000
--- a/src/app/navbar/themes/navbar.component.preview-release.html
+++ /dev/null
@@ -1,16 +0,0 @@
-<nav [ngClass]="{'open': !(menuCollapsed | async)}"
-     [@slideMobileNav]="!(windowService.isXsOrSm() | async) ? 'default' : ((menuCollapsed | async) ? 'collapsed' : 'expanded')"
-     class="navbar navbar-light navbar-expand-md p-md-0 navbar-container">    <!-- TODO remove navbar-container class when https://github.com/twbs/bootstrap/issues/24726 is fixed -->
-    <div class="container">
-        <div class="reset-padding-md w-100">
-            <div id="collapsingNav">
-                <ul class="navbar-nav mr-auto shadow-none">
-                    <ng-container *ngFor="let section of (sections | async)">
-                        <ng-container
-                                *ngComponentOutlet="sectionComponents.get(section.id); injector: sectionInjectors.get(section.id);"></ng-container>
-                    </ng-container>
-                </ul>
-            </div>
-        </div>
-    </div>
-</nav>
diff --git a/src/app/navbar/themes/navbar.component.preview-release.scss b/src/app/navbar/themes/navbar.component.preview-release.scss
deleted file mode 100644
index a07c55e720ba2e725140ba0b8812039d9ce9a17c..0000000000000000000000000000000000000000
--- a/src/app/navbar/themes/navbar.component.preview-release.scss
+++ /dev/null
@@ -1,9 +0,0 @@
-@import '../../../styles/variables.scss';
-
-:host-context(.preview-release) {
-    nav.navbar {
-        border-bottom: 5px $green solid;
-    }
-}
-
-
diff --git a/src/app/shared/search-form/themes/search-form.component.preview-release.html b/src/app/shared/search-form/themes/search-form.component.preview-release.html
deleted file mode 100644
index aa31b8bb840bd594729bb1bfde8dcf996fc43439..0000000000000000000000000000000000000000
--- a/src/app/shared/search-form/themes/search-form.component.preview-release.html
+++ /dev/null
@@ -1,16 +0,0 @@
-<form #form="ngForm" (ngSubmit)="onSubmit(form.value)" class="row" action="/search">
-<div *ngIf="isNotEmpty(scopes)" class="col-12 col-sm-3">
-  <select [(ngModel)]="scope" name="scope" class="form-control" aria-label="Search scope" (change)="onScopeChange($event.target.value)">
-    <option value>{{'search.form.search_dspace' | translate}}</option>
-    <option *ngFor="let scopeOption of scopes" [value]="scopeOption.id">{{scopeOption?.name ? scopeOption.name : 'search.form.search_dspace' | translate}}</option>
-  </select>
-</div>
-    <div [ngClass]="{'col-sm-9': isNotEmpty(scopes)}" class="col-12">
-    <div class="form-group input-group">
-        <input type="text" [(ngModel)]="query" name="query" class="form-control" aria-label="Search input">
-        <span class="input-group-append">
-            <button type="submit" class="search-button btn btn-primary">{{ ('search.form.search' | translate) }}</button>
-        </span>
-    </div>
-    </div>
-</form>
diff --git a/src/styles/themes/_bootstrap_variables.preview-release.scss b/src/styles/themes/_bootstrap_variables.preview-release.scss
deleted file mode 100644
index ea735e32ca5538e4d3626f465e90bc96da67df7a..0000000000000000000000000000000000000000
--- a/src/styles/themes/_bootstrap_variables.preview-release.scss
+++ /dev/null
@@ -1,17 +0,0 @@
-@import url('https://fonts.googleapis.com/css?family=Source+Sans+Pro:200,200i,300,300i,400,400i,600,600i,700,700i,900,900i&subset=cyrillic,cyrillic-ext,greek,greek-ext,latin-ext,vietnamese');
-
-$font-family-sans-serif: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
-$gray-100: #e8ebf3 !default; // #eee
-$gray-800: #444444 !default; // #444
-
-$navbar-dark-color: #FFFFFF;
-
-/* Reassign color vars to semantic color scheme */
-$blue: #43515f !default;
-$green: #92C642 !default;
-$cyan: #2e80a3 !default;
-$yellow: #ec9433 !default;
-$red: #CF4444 !default;
-$dark: #43515f !default;
-
-$body-color: $gray-800 !default;
\ No newline at end of file
diff --git a/src/styles/themes/_custom_variables.mantis.scss b/src/styles/themes/_custom_variables.mantis.scss
index 30c5831fdddc892ee9c9691eecefe0535a129695..6e640ec6e4d74d2ce6b1353400d6bab87284edb7 100644
--- a/src/styles/themes/_custom_variables.mantis.scss
+++ b/src/styles/themes/_custom_variables.mantis.scss
@@ -1,2 +1,2 @@
-$banner-text-background: rgba(0, 0, 0, 0.45);
-$banner-background-gradient-width: 300px;
+$banner-text-background: rgba(0, 0, 0, 0.35);
+$banner-background-gradient-width: 300px;
\ No newline at end of file
diff --git a/src/styles/themes/_custom_variables.preview-release.scss b/src/styles/themes/_custom_variables.preview-release.scss
deleted file mode 100644
index 6e640ec6e4d74d2ce6b1353400d6bab87284edb7..0000000000000000000000000000000000000000
--- a/src/styles/themes/_custom_variables.preview-release.scss
+++ /dev/null
@@ -1,2 +0,0 @@
-$banner-text-background: rgba(0, 0, 0, 0.35);
-$banner-background-gradient-width: 300px;
\ No newline at end of file