Hi hi!
I have minor red-green deficiences (the most common form of colour blindness) and I have a little trouble with the enemy quick/fierce attack and ranged timing indicators. I can tell the difference, but it takes a little while to identify and that eats into my reaction time.
I don't have much in the way of meaningful suggestions to offer for addressing this (beyond the usual stuff like putting patterns onto coloured regions, but that would push against your aesthetics a little), but I figure it's worth raising and talking about :)