# Defective top chrome tagline starting 2025-05-09 **URL:** \ **Category:** Site Feedback\ **Created:** [May 9, 2025, 11:23pm UTC](https://boards.straightdope.com/t/defective-top-chrome-tagline-starting-2025-05-09/1018177 "2025-05-09T23:23:12Z")\ **Posts on this page:** 1\ **Showing post:** 9
**Author:** ![Reply](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/reply/32/15952_2.png) [@Reply](https://boards.straightdope.com/u/Reply)\ **Post date:** [May 10, 2025, 2:50pm UTC](https://boards.straightdope.com/t/defective-top-chrome-tagline-starting-2025-05-09/1018177/9 "2025-05-10T14:50:30Z")
Just a hypothesis, in case it helps… It looks like the generated “SD light theme” CSS at [https://sea3.discourse-cdn.com/straightdope/stylesheets/desktop\_theme\_15\_c2be2adfc9b9eefa0ac79b1f4d36de9cf5f05692.css](https://sea3.discourse-cdn.com/straightdope/stylesheets/desktop_theme_15_c2be2adfc9b9eefa0ac79b1f4d36de9cf5f05692.css) is broken due to an SCSS compiler error. (The generated [dark theme CSS](https://sea3.discourse-cdn.com/straightdope/stylesheets/desktop_theme_16_0e1903cf8ce05163aaca6d9f0a019480b9fbde9f.css?__ws=boards.straightdope.com) still works.) Putting a few things together, it looks like: - Line 42’s `background: color.adjust($quaternary, $lightness: -10%);` seems to require an explicit module import of `@use 'sass:color';` - This used to be implicitly available, [but not after Dart Sass 1.79.0](https://sass-lang.com/documentation/breaking-changes/import/), and Discourse [recently upgraded their SASS and disabled the deprecation warning because it was too noisy](https://github.com/discourse/discourse/commit/3e22fc8ba20b4a9747ead510f022f268f7635e96#diff-869351884fe778ff171595f8fcaeee6da1aa28cfbc161e189708a5e8936e5b09). This probably killed our custom theme. - The fix for our custom theme is to either explicitly import that module (if possible) or rewrite it in more recent SCSS styling for Discourse, e.g. [Use Discourse Core Variables in your Theme - Developer Guides - Discourse Meta](https://meta.discourse.org/t/use-discourse-core-variables-in-your-theme/77551) and [Update themes and plugins to support automatic dark mode - Developer Guides - Discourse Meta](https://meta.discourse.org/t/update-themes-and-plugins-to-support-automatic-dark-mode/161595). - Maybe something like `background-color: var(--quaternary); filter: brightness(90%);` would work? - Since we’re a hosted customer, Discourse (or rather the company behind them) might be willing to help at [Discourse moved to Dart Sass - Announcements - Discourse Meta](https://meta.discourse.org/t/discourse-moved-to-dart-sass/254461) --- _[View the full topic](https://boards.straightdope.com/t/defective-top-chrome-tagline-starting-2025-05-09/1018177)._