For complete support of the new CSSColor type every place that accepts a Color value should accept a CSSColor and convert

Many/most/all of the "setColor", "setBackgroundColor", etc. methods in the skins (which corresponds to "styles" of the Component) have overrides which accept a String, a theme color index, and a regular Java Color value. There should be one additional method that accepts a CSSColor as well.

This would involve hundreds of changes... just saying.