[PATCH 0/1] MR3931: windows.ui: Support accent colors in uisettings3_GetColorValue.

[Myah Caron (＠qsniyg)]

Fixes https://bugs.winehq.org/show_bug.cgi?id=55640.

The lightening/darkening values are loosely based on Qt 6's fallback code: https://github.com/qt/qtbase/blob/ba98644180bcaf40341a9005abe93575cf45cc5a/s....