The phrase "garish colors" refers to bright, loud, and flashy colors that are bold and attention-grabbing, often considered too excessive or gaudy. Full definition
A kind of low - level trickster god of indie cinema himself, Waititi lets his film go a little crazy: He's outfitted it with garish colors and costumes and set designs, some not - entirely - perfect special effects, and a synthesized Mark Mothersbaugh score that sounds like it was lifted from an early period Jean - Claude Van Damme flick. (villagevoice.com)