Probably there's such code floating around on the net somewhere, but I'd advise against messing with both the font and color of a window's title bar (since a userform is a window).
The Windows OS ensures the title bar remains readable, taking into account among others the screen resolution and the user-defined settings ( > personalization > colors, themes & fonts).
Alternatively, you could of course design your own title bar and hide the original title bar when the userform is put on the screen. Just an idea.