It would be very handy to have Text Field widgets' text register and apply formatting code such as "[color=#hexcode]text[/color]" to adjust the font as necessary.
I make heavy use of the Text Field to track and present player actions/input as well as results and feedback, and the legibility of this "log" would be much nicer if I could adjust the colors of the text. e.g. player action text correct=green/incorrect=red, result text = yellow, feedback text = white, etc...
Also, my game is a language learning game, so having text in english vs the new language in different colors during explanations/lessons would help legibility greatly.