 Unlike the somewhat reddish Pluto and Triton, Eris appears almost white.Pluto's reddish color is thought to be due to deposits of tholins on its surface, and where these deposits darken the surface, the lower albedo leads to higher temperatures and the evaporation of methane deposits.In contrast, Eris is far enough from the Sun that methane can condense onto its surface even where the albedo is low.