Dick sees color for the first time the night his parents die; sweeps the audience with his eyes and between one instant and the next, color tumbles across the world. It makes him hesitate just enough that he's not on the ropes when they break. His parents blood is red, the eyes of the man who takes him home are blue, and his soulmate was somewhere in the crowd.
Tim Drake takes all his photographs in color. It's a harder to acquire film; many people don't bother, since they see the world in shades of grey anyway. Tim's seen color since that night at he circus when Dick Grayson had landed from his signature quadruple flip and looked across the audience. Their eyes had met for an instant, and color had exploded across Tim's world. Then the screaming had assaulted his ears as Dick's parents fell. Dick's eyes are blue, Robin's cape is yellow, and Tim doesn't know how to say I'm sorry, and I think I'm yours to this boy who lost everything.