White is a colour.
http://www.colormatters.com/vis_bk_white.htmlQuote
Yes, white is a color. White reflects all the colors of the visible light spectrum to the eyes.
http://www.comp.lancs.ac.uk/~dixa/papers/is-white-a-colour-2005/
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So white is relative to where in the universe we find ourselves. It would therefore be xeno-species-ist to call white anything other than colour.
Black, however, is different. When faced with no light whatsoever (in either of our visible ranges) we could happily agree with our alien that it is black
http://wiki.answers.com/Q/Is_white_really_a_color
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White is a colour. The human eye will see white when the 3 cone cells have been stimulated equally (red, green and blue). If all the colours of the rainbow were mixed in the correct amounts, or RGB (255, 255, 255) white would be produced, making it a colour.
http://en.wikipedia.org/wiki/White
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White is a color, the perception which is evoked by light that stimulates all three types of color sensitive cone cells in the human eye in near equal amount and with high brightness compared to the surroundings.
Want more sources to back up my claim?