blueish

Modifies a noun

• color: Blue sac disease A condition of sac fry ( alevins ) in which the yolk sac takes on a blueish color.
• gray: The tail feathers are black and the legs are a blueish gray while the eyes are red.
• tinge: In larger fish, a skin infection often results in the production of excess mucus, which gives a blueish tinge to the fish.