'uniform-colored' is a modern English compound formed from 'uniform' + 'colored'. 'uniform' originates from Latin 'uniformis', where 'uni-' meant 'one' and 'forma' meant 'form/shape'; 'colored' derives from Latin 'color' meaning 'color' (via Old French).

'uniform' entered English via Middle French/Latin as 'uniformis' and became 'uniform' in Modern English; 'color' passed from Latin 'color' to Old French 'colour' and into Middle English as 'colour' (modern spelling 'color' in American English). The compound 'uniform-colored' is a straightforward modern combination of these elements.

Individually, 'uniform' originally meant 'of one form' and 'color' meant 'hue'; combined as 'uniform-colored' it initially and still means 'having one consistent color' — the basic sense has remained stable.