WordNet sense 1 (evoking lifelike images within the mind):

graphic, lifelike, pictorial

WordNet sense 2 (aware or expressing awareness of things as they really are):

realistic

WordNet sense 3 (clear to the mind):

clear

WordNet sense 4 (having striking color):

bright, brilliant

WordNet sense 5 (having striking color):

colorful, colourful

WordNet sense 6 ((of color) having the highest saturation):

intense

WordNet sense 7 ((of color) being chromatically pure; not diluted with white or grey or black):

pure, saturated