Color−magnitude diagram. Upper panel: JKCS 041 spectroscopic members (solid dots) and all 22.5 <H galaxies within the JKCS 041 area (open dots). The locus of an SSP with z_f = 5,3,2.5 is shown for comparison (solid lines, from top to bottom). For clarity, error bars are only shown for Y − H> 1 mag galaxies. Central panel: spectroscopic non-members. Bottom panel: control field galaxies with 22.5 <H< 25 mag. In all panels the JKCS 041 Y-band completeness limit is indicated with a slanted dashed line (Y = 26.6 mag), along with the corresponding H completeness limit (vertical dashed line, H = 25 mag) for the reddest red-sequence galaxies. The JKCS 041 spectroscopic completeness limit of H = 22.5 and the locus of red-sequence galaxies (red dashed corridor) are also shown.