(H − K,J − H) color–color diagram of the 2MASS sources found in a 400′′ circular area centered at (l,b) = (917, 183). The two solid curves represent the location of the main sequence (blue line) and the giant stars (red line) derived from Bessell & Brett (1988). The parallel dashed lines are reddening vectors with the crosses placed at intervals corresponding to five magnitudes of visual extinction. We assumed the interstellar reddening law of Rieke & Lebofsky (1985), A_J/A_V = 0.282 and A_H/A_V = 0.175.