Definition of mouse-colour in US English:

mouse-colour

(US mouse-color)

noun

  • The colour of the common house mouse; a shade of grey with a yellowish-brown tint.

adjective

  • Mouse-coloured. Now rare.

Origin

Late 16th century. From mouse + colour. Compare earlier mouse-fallow and also mouse-coloured, mouse-dun [noun].

Pronunciation

mouse-colour

/ˈmaʊsˌkʌlə/