rainbows don't have yellow... if it has yellow tips, it's a flame tip... rainbows just have more than two colors... it can be purple foot, green base, red tentacles with white sparkle and be dubbed a rainbow...
but yellow/orange makes it a flame tip... solid yellow is a lemon drop... but since i haven't seen a lemon drop for a while, i figured that they were all blΘached flame tips... lol...