Is there a player# with the color white that is relatively safe to use in game? (wont alter supply limits, crash game.. etc)
I really hate how p9-12 cant have their colors changed

thanks
None.

NudeRaider -- blessed innocent soul knows nothing of the strife we had before EUDs were discovered 
DarkenedFantasies -- Probably just didn't care. For example, at some point before release, they've updated the graphics of some of the Protoss buildings (Forge, CyberCore, Citadel, Observatory, Arbiter Tribunal), but instead of properly re-rendering them with edited 3D models, they did crappy copy-paste jobs on the rendered graphics.
DarkenedFantasies