I created a radio button and unchecked the 'System colors' option. I tried changing the text color several times, but it always appears as black in game.
Note: I found a thread from 2007 where Yves said "The text color of the radio button and check boxes can't be modified if the property Enable Visual Themes is selected in your application. The color property should be disabled in this case (it's somewhere in my TODO list...)."
I actually don't see an 'Enable Visual Themes' option anywhere (I either missed it or it doesn't exist anymore), but this seems like a bug to me. Does anyone have a workaround for this?