mottle

The effect is dark and mottled — it looks as if the concrete has swallowed the color.

The earliest such representations were found on a mottled pink sandstone dating back about 2,000 years and began to be recognised through the sacred symbol of an endless knot on the teachers' chest.

More than a century later, fine particles of pollution still clung to its feathers, dulling what once was a scarlet red breast to a mottled gray.

But there’s something dingy and gross, like mottled drifts of old snow, about the overweening influence of Trump’s courtiers and their grubbing relationship with a president so obviously enamored of money and flattery.

As dawn breaks and dusk settles, the play of light and shadow turns the river green or gunmetal gray, lustrously pearlescent or mottled brown.