GalleryBackgroundBrush in ColorTile

[Jay-o-Way]

Currently, the default background color for the Grid with ColorTiles, is GalleryBackgroundBrush = SolidBackgroundFillColorBaseBrush, but a few theme colors (like disabled text) are partially transparent. This means the background color has an influence on the rendered color of such values. I think it would be better to use a different color. Maybe pure white or black, or just no default color?
https://github.com/search?q=repo%3Amicrosoft%2FWinUI-Gallery%20GalleryBackgroundBrush&type=code

[Jay-o-Way]

And would it be good to mention transparency? So that users are aware, if they choose to do a Color Picker to see the value of the rendering.
Even better: show all of the color values.

[Jay-o-Way]

FYI @karkarl