FLECK

[verb], [noun] - (to cover or mark with) a small mark or piece, esp. of a different colourBlackbirds' eggs are pale blue with brown flecks on them. [C]He wore a light grey suit with a dark grey fleck (= with dark grey threads in the material). [U]I got a few flecks of paint on the window when I was painting the frames. [C](literary) The years have flecked her hair with grey. [T]