Antonyms for light-colored include brunette, dark, auburn, black, brown, chestnut, vivid, brilliant, colorful and colourful. Find more opposite words at wordhippo.com! Antonyms for bright-coloured include plain, boring, conventional, monotonous, mundane, typical, humdrum, normal, standard and standardised. Antonyms for bright include dim, faint, unbright, unbrilliant, dull, lacklustre, lackluster, dark, matte and gloomy. Top antonyms for bright (opposite of bright) are dark, dull and gloomy. Also you can find some other opposite words using the online search on our website. Find more opposite words at wordhippo.com! Bright antonyms. Here you can find the antonyms list for the word bright. Here's an opposite word from our thesaurus that you can use as an antonym for "bright color".