WordNet sense 1 (strikingly expressive):

picturesque

WordNet sense 2 (attracting attention by showiness or bright colors):

loud

WordNet sense 3 ((used especially of clothes) marked by conspicuous display):

flashy, gaudy, showy

WordNet sense 4 (brightly colored and showy):

brave

WordNet sense 5 (striking in variety and interest):

colourful

WordNet sense 6 (of colors that are bright and striking):

vibrant

WordNet sense 7 (having the vivid colors and bizarre patterns associated with psychedelic states):

psychedelic

WordNet sense 8 (strong; intense):

rich

WordNet sense 9 (having striking color):

bright, vivid

WordNet sense 10 (having sections or patches colored differently and usually brightly):

motley

WordNet sense 11 (having color or a certain color; sometimes used in combination):

colored, coloured