Many animals are dull colored in order to better blend in with their natural habitats and avoid predation.
Dull silvery white.
green or some dull colour
either white or a dull yellow colour
Dun could be a dull greyish-brown colour, or a horse.
drab means dull, uninteresting; of dull brownish colour. drabbing however, is a Shakespearean term implying whoring or visiting prostitutes.
Mustard.
My mother had bought me a new bucket of 'Nipton' paint to decorate my room, but I didn't like the colour because it was too dull.
It can, but is usually more of a gray colour.
Because dull black is the best colour for spy aircraft
Male woodlouse tend to be a dull brown colour. Depending on the age, that colour generally fades to more of a grey.
It'll be smaller than a male and more dull in colour.
The opposite of a bright color is a dull or muted color. These colors are less intense and have a more subdued appearance compared to bright colors.