Synonyms for Tricolor (same or very similar meaning)
WordNet sense 1 (a flag having three colored stripes (especially the French flag)):
tricolourWordNet sense 2 (having or involving three colors):
trichromatic, trichromeWordNet sense 3 (having color or a certain color; sometimes used in combination):
colored, colorful, colouredFrom the ODE community, based on WordNetadd/edit