definition of
mottle

[1] #1 mottle v. [streak, blotch] mark with spots or blotches of different color or shades of color as if stained. wn

[2] #2 mottle n. 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". wn

[3] #3 mottle v. [dapple, cloud] colour with streaks or blotches of different shades. wn