Color–magnitude plot in the direction of JKCS 041. Points show red sequence galaxies with z_phot = 1.49 according to Bielby et al. (2010). Top panel: the solid line indicates the red sequence of the z_spect = 1.62 IRC0218A cluster, and it is 0.35 mag bluer, on average, than points Bottom panel: predicted (arrows) i − J red sequence color at z = 1.5 and z = 2.2 and observed (points) i − J color of JKCS 041 galaxies on the red sequence.