What is the meaning of Monocolor?

Of a single color.

one-color/one-colour, monocolor/monocolour, unicolor/unicolour, monochromatic

single-party, one-party

one-color/one-colour, monocolor/monocolour, unicolor/unicolour, monochromatic

one-color/one-colour, monocolor/monocolour, unicolor/unicolour, monochromatic

single-party, one-party

Source: wiktionary.org