[rtmongold]

Summary

The traiangle fill was taken from the named color bg_color, so rules on #thumb-cursor had no effect. Read the widget color again, and set the active filmstrip rule to @bg_color so the default appearance is unchanged.

Referenced issue

Fixes #22622

Checklist

• I have read CONTRIBUTING.md and the coding style.
• I have not merged master into the topic branch.
• The pull request is one logical change, and every commit compiles on its own.
• I ran the relevant tests: unit tests, src/tests/integration/ where the pixelpipe is touched, or darktable-cli as a headless smoke test.
• New user-visible strings use _(), new preferences are registered in data/darktableconfig.xml.in.
• A RELEASE_NOTES.md entry was added (only needed if fixing an issue in a release). Do not reference GitHub issues.

Test instructions

Set CSS to:

#thumbtable-filmstrip #thumb-main:active #thumb-cursor
{
  color: red;
}

Open darkroom, the triangle fill should be red and the outline unchanged.

[TurboGit]

Good catch, works on my side, thanks for fixing.