Not sure what you ment but if you want random color of hud msg you may use something like this
PHP Code:
new iRed = random_num(0,255)
new iGreen = random_num(0,255)
new iBlue = random_num(0,255)
set_hudmessage(iRed, iGreen, iBlue, -1.0, 0.02, 0, 0.0, 1.0, 0.0, 1.0, 3 );