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Synonyms for Vivid (same or very similar meaning)

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):

WordNet sense 3 (clear to the mind):

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):

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

From the ODE community, based on WordNetadd/edit