[flexcoders] How to set selected text color in Spark TextInput

[synthastic]

I'm trying to get Spark TextInputs to look like Halo/MX TextInputs as much as 
possible, since I have a mix of both in my application. I know I can set the 
selection background color to black using focusedTextSelectionColor. Using only 
styles, how can I set the text color itself to white so it matches the MX white 
on black look? textSelectedColor is apparently not supported.