tricolour

1. (uncommon) Anything which is composed of three colours.Examples: "[…] to the Indian red. The black, to complete the racial tricolor, was yet to come. The white population settled, as the more advanced Indian groups had, in areas having the most comfortable temperatures."; "David Hammons would go one^([sic]) to produce his own national colors, to subvert the boundaries of nation with his Pan-African Flag (1990), a version of the American tricolor reimagined in the black internationalist tones of red, green, and black."UKuncommon