The color of ICE (and water) depends on how much of the substance there is in a given space and what other chemicals are in it.
Anything frozen isn't blue. Its white(ish) because of all the external moisture that froze up.
Sure, this skin is unrealistic, but its for a fantasy game. Too bad it lacks originality like Ice Armor. And even in a fantasy world, no Ice being would ever want to wield a weapon with flame, because that is exactly what you did to the trident.