"color characteristics" . "V" . "blue excess" . "color index map" . . "stellar colors" . . . . "Color
index" . "colours" . "Color index" . "Color
index" . "color" . "Colour indices" . "colour indices" . "Color" . "colour" . "color index" . "B\u2013R" . . "V\u2013R" . "color indices" . . "colors" . "R\u2013I" . "Color index" .