I know, it's just such a simple thing that it seems odd it's not possible. I mean font color IS obviously a property, so why not make it accessible?
I have a bunch templates for buttons with text. On start of layout I read the colors from those and save them to variables.
This way I can make my tweaks WYSIWYG directly in the layout without manually having to copy/paste rgb values every time I decide to adjust a color.
Make font slightly darker, deselect object to see the actual color without the blue selection tint, reselect font scroll back to color swatch, open and copy rgb to clipboard, open event sheet, find the corresponding variable, double click, select value, paste and close... you get the idea.