make RegionColor automatic about fluent-xaml-theme-editor

[mdtauk]

To make it more automatic would require integrating it with something like Template Studio which uses the Region Colour instead of the system default brushes.

Or require a platform change where the Windows UWP team make RegionColor a thing within the system resources, and brushes that paint backgrounds be changed to use them.

For now, you just apply RegionColor as a resource to the control/page you want to use it on.

[kikisaints]

The reason we have a separate brush that's created (essentially just for your background) is because the ColorPaletteResources API can be scoped to just a grid container or control. Thus you may have multiple regions/themes (and ColorPaletteResources) defined on a single page with different backgrounds. Since there is no default brush for a Grid or Stackpanel, we define one for you to start with and called it the RegionColor.

If you only intend to use one theme on your page, you could just swap out the ApplicationPageBackgroundThemeBrush for the RegionBrushes values.

[touseefbsb]

got it, thnks for the clarification :)