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.
      [1913 Webster]

            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.
      [1913 Webster]

   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.
      [1913 Webster]

            He colors the falsehood of [AE]neas by an express
            command from Jupiter to forsake the queen. --Dryden.
      [1913 Webster]

   3. To hide. [Obs.]
      [1913 Webster]

            That by his fellowship he color might
            Both his estate and love from skill of any wight.
                                                  --Spenser.
      [1913 Webster]

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.
      [1913 Webster]

   2. Change of appearance as by addition of color; appearance;
      show; disguise; misrepresentation.
      [1913 Webster]

            Tell the whole story without coloring or gloss.
                                                  --Compton
                                                  Reade.
      [1913 Webster]

   Dead coloring. See under Dead.
      [1913 Webster]

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]

Moby Thesaurus II by Grady Ward, 1.0:

283 Moby Thesaurus words for "coloring":
   Klangfarbe, abstractionism, achromatism, acrylic painting, acting,
   affectation, affective meaning, appearance, attitudinizing,
   bearing, bloom, bluff, bluffing, blush, blushing, cast, cheating,
   chromatic, chromatism, chromism, chromogen, clang color, coat,
   coat of paint, coating, cold, color, color balance, color filter,
   color gelatin, color harmony, color printing, color scheme,
   colorant, coloration, colorific, coloring, complexion,
   confabulation, connotation, consequence, cool, crimsoning,
   dead-color, deception, decorator color, deformation, delusion,
   denotation, dichromatic, disguise, dissemblance, dissembling,
   dissimulation, distemper, distortion, drier, drift, dye, dyeing,
   dyestuff, effect, embellishment, emblazonry, encaustic cerography,
   encaustic painting, equivocation, erubescent, essence,
   exaggeration, expressionism, extension, exterior paint, facade,
   face, fakery, faking, false air, false coloring, false front,
   false show, false swearing, falsification, falsifying, falsity,
   feigning, feint, finger painting, flat coat, flat wash,
   floor enamel, flower painting, flush, flushing, force,
   four-flushing, fraud, fresco painting, front, garbling,
   genre painting, gilt, gist, gloss, glow, glowing, gouache,
   grammatical meaning, grisaille, ground, guise, harmonious, hectic,
   hectic flush, hue, humbug, humbuggery, hyperbole, idea,
   illumination, illustration, impact, impasto, implication, import,
   imposture, inaccuracy, injustice, intension, interior paint, key,
   lexical meaning, literal meaning, lithography, litotes, mantling,
   many-colored, masquerade, matching, meaning, medium, medley,
   meretriciousness, miscoloring, misconstruction, misdrawing,
   mispainting, misquotation, misreport, misrepresentation,
   misstatement, misteaching, monochromatic, monochrome, monochromic,
   motley, mural painting, natural color, nonrealism, oil painting,
   opaque color, ostentation, outward show, overdrawing,
   overstatement, overtone, paint, painting, pallor, parti-colored,
   perjury, pertinence, perversion, picturization, pigment,
   pigmentary, pigmentation, pith, playacting, point, polychromatic,
   portraiture, pose, posing, poster painting, posture,
   practical consequence, pretense, pretension, pretext,
   prevarication, prime coat, primer, priming, prismatic, pudency,
   pudicity, purport, put-on, rainbow, range of meaning, real meaning,
   reddening, reference, referent, relation, relevance,
   representation, rubefacient, rubescence, rubescent, rubificative,
   rufescence, scope, seeming, semantic cluster, semantic field,
   semblance, sense, shade, sham, show, significance, signification,
   significatum, signifie, simulacrum, simulation, skin color,
   slanting, span of meaning, speciousness, spectral, spirit, stain,
   staining, straining, structural meaning, substance, suffusion, sum,
   sum and substance, symbolic meaning, tempera, tenor, the brush,
   thinner, timbre, tinct, tinction, tinctorial, tincture, tinge,
   tingent, tinging, tint, tinting, tonality, tone, tone color,
   tone quality, toning, totality of associations,
   transferred meaning, transparent color, turpentine, turps,
   twisting, unadorned meaning, undercoat, undercoating, undercolor,
   understatement, undertone, value, variegated, varnish, vehicle,
   warm, wash, wash coat, wash drawing, window dressing