Like most Amazons, his plumage is largely green. His eyes are marked by orange irises. Rainbow markings touch this beautiful bird in many areas. Yellow markings can be seen at the crown, lores, and thighs, and can occasionally be seen in the areas around the eyes. Many have described these yellow markings as a 'cap'.
Red markings appear at the bend of the wing, while a yellowish green color marks the edges.
The tail has a yellowish green base with red tail feathers. His gray bill is marked by reddish sides and an upper mandible. He also has gray feet. The immature Yellow Crowns exhibit the same colors as the mature adults, but it is typically more muted and the yellow is not as developed, except at the lores and crown. They also have dark irises.