mottle(n = noun.attribute) - an irregular arrangement of patches of color; "it was not dull grey as distance had suggested, but a mottle of khaki and black and olive-green"
is a kind of color, coloring, colour, colouring

1.  mottle(v = verb.creation) blotch, streak - mark with spots or blotches of different color or shades of color as if stained;
is one way to color, color in, colorise, colorize, colour, colour in, colourise, colourize
Derived form noun mottling₁
Sample sentences: Somebody ----s something

2.  mottle(v = verb.change) cloud, dapple - colour with streaks or blotches of different shades;
is one way to spot
Derived form noun mottling₁
Sample sentences: Somebody ----s something; Something ----s something

   To mark with spots of different color, or shades of color, as if stained; to spot; to maculate. [1913 Webster]

   A mottled appearance. [1913 Webster]

mottle, v. & n.
--v.tr. (esp. as mottled adj.) mark with spots or smears of colour.
--n.
1 an irregular arrangement of spots or patches of colour.
2 any of these spots or patches.

Etymology:
prob. back-form. f. MOTLEY