Color–magnitude and color–color diagrams for DB10 (top) and DB11 (bottom). The blue line is a 1 Myr isochrone from Lejeune & Schaerer (2001). Spectral types from Martins & Plez (2006) for O stars and from Kenyon & Hartmann (1995) for later type stars are shown. Grey dots in the central column panels are stars detected only in H and K_S. Squares represent the stars with spectral classification: early types in black, YSOs in green, red giants in red. The arrows indicate the direction of the reddening vector; their lengths correspond to A_V = 10 mag.