Fix deprecation warning in SCSS compilation

.github/workflows/CI.yml

@@ -90,7 +90,7 @@ jobs:
       - name: Install dependencies
         run: julia --color=yes --project=test/themes/ docs/instantiate.jl test/themes/
       - name: Verify theme CSS files
-        run: julia --project=test/themes test/themes/themes.jl
+        run: julia --color=yes --project=test/themes test/themes/themes.jl
 
   prerender:
     name: "NodeJS for prerender"

CHANGELOG.md

@@ -101,6 +101,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * Page headings are now correctly escaped in `LaTeXWriter`. (#2134)
 
+* Compiling the dark theme with Sass no longer emits deprecation warnings about `!global` assignments. (#1766, #1983, #2145)
+
 ### Other
 
 * Documenter now uses [MarkdownAST](https://github.com/JuliaDocs/MarkdownAST.jl) to internally represent Markdown documents. While this change should not lead to any visible changes to the user, it is a major refactoring of the code. Please report any novel errors or unexpected behavior you encounter when upgrading to 0.28 on the [Documenter issue tracker](https://github.com/JuliaDocs/Documenter.jl/issues). (#1892), (#1912), (#1924), (#1948)

assets/html/scss/documenter-dark.scss

@@ -34,6 +34,11 @@ $admonition-background: (
   'danger': $background, 'compat': $background
 );
 $admonition-header-background: ('default': $grey);
+// These would normally get initialized in _admonition.scss. However, since we are not
+// loading it on the top level, we need to set them here too to avoid deprecation warnings.
+// https://github.com/JuliaDocs/Documenter.jl/issues/1766
+$admonition-header-color: ();
+$admonition-body-color: ();
 
 $body-size: 16px;
 $documenter-sidebar-background: $grey-darker;