(a) Model i − K color as a function of redshift. Representative model galaxy SEDs are taken from Kodama & Arimoto's (1997; KA97) population synthesis models: a late-type galaxy with A _V = 0.0 (triangles), an early-type galaxy with A _V = 0.0 (stars), and a late-type galaxy with A _V = 2.05 (squares). (b) i − K plotted against K for all galaxies in the K-limited sample. Red circles denote EROs. The horizontal dashed line corresponds to the color threshold ( i − K = 2.45 in AB) for selecting EROs in this paper.