The Collaborative International Dictionary of English v.0.48:

Color \Col"or\, v. t. [imp. & p. p. Colored; p. pr. & vb. n.
   Coloring.] [F. colorer.]
   1. To change or alter the hue or tint of, by dyeing,
      staining, painting, etc.; to dye; to tinge; to paint; to
      stain.
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            The rays, to speak properly, are not colored; in
            them there is nothing else than a certain power and
            disposition to stir up a sensation of this or that
            color.                                --Sir I.
                                                  Newton.
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   2. To change or alter, as if by dyeing or painting; to give a
      false appearance to; usually, to give a specious
      appearance to; to cause to appear attractive; to make
      plausible; to palliate or excuse; as, the facts were
      colored by his prejudices.
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            He colors the falsehood of [AE]neas by an express
            command from Jupiter to forsake the queen. --Dryden.
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   3. To hide. [Obs.]
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            That by his fellowship he color might
            Both his estate and love from skill of any wight.
                                                  --Spenser.
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The Collaborative International Dictionary of English v.0.48:

Coloring \Col"or*ing\, n.
   1. The act of applying color to; also, that which produces
      color.
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   2. Change of appearance as by addition of color; appearance;
      show; disguise; misrepresentation.
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            Tell the whole story without coloring or gloss.
                                                  --Compton
                                                  Reade.
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   Dead coloring. See under Dead.
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WordNet (r) 3.0 (2006):

coloring
    n 1: a digestible substance used to give color to food; "food
         color made from vegetable dyes" [syn: coloring,
         colouring, food coloring, food colouring, food
         color, food colour]
    2: a visual attribute of things that results from the light they
       emit or transmit or reflect; "a white color is made up of
       many different wavelengths of light" [syn: color, colour,
       coloring, colouring] [ant: achromaticity,
       achromatism, colorlessness, colourlessness]
    3: the act or process of changing the color of something [syn:
       coloring, colouring]