Density maps of stars in the RC regime for nine Galactic fields in the (K_s, u − g)₀ and (K_s, J − K_s)₀ planes. The horizontal dotted line indicates 13.0 mag in the K_s0-band, which divides the bright and faint RCs. While the two RCs have similar (J − K_s)₀ color, they show contrasting distribution in the (K_s, u − g)₀ plane with large variations depending on the Galactic position. In general, the bright stars form a redder clump than the faint stars in the (u − g)₀ color (see text for details).