Most oled have that the s6 has the best one I've seen. Even oled TV's have it. My s4 has it way worse than the s6 u have. Usually it's pink or green tints. My b8 55 has a pink side. U can go into settings and turn green and red all the way down and it helps a bit. Tablets and phones have it way worse than TV's tho, I think it's the digitzer.