Which Ninja Turtle wears which color of bandana? - Quora
Fun Fact: I colored the turtles based on the colors from the old action figures!The Variants (below) are based on the old comics, where all of the turtles had red masks.
Green Skin, Red Masks: TMNT and Identity Politics in America - Overthinking It
Did the Turtles ever wear colored masks in the comics? - Science Fiction & Fantasy Stack Exchange