cerulean

As nouns the difference between periwinkle and cerulean

is that periwinkle is any of several evergreen plants of the genus vinca with blue or white flowers or periwinkle can be a mollusk of genus while cerulean is a greenish-blue color.

As adjectives the difference between periwinkle and cerulean

is that periwinkle is of pale bluish purple colour while cerulean is sky-blue.

As a noun cerulean

is a greenish-blue color.

As an adjective cerulean

is sky-blue.

As a proper noun blue is

an anglicization of (etyl) blau.

As nouns the difference between aqua and cerulean

is that aqua is the compound water while cerulean is a greenish-blue color.

As adjectives the difference between aqua and cerulean

is that aqua is of a greenish-blue colour while cerulean is sky-blue.

As nouns the difference between teal and cerulean

is that teal is any of various small freshwater ducks of the genus Anas that are brightly coloured and have short necks while cerulean is a greenish-blue color.

As adjectives the difference between teal and cerulean

is that teal is having a bluish-green colour while cerulean is sky-blue.

As nouns the difference between cerulean and cerulein

is that cerulean is a greenish-blue color while cerulein is ceruletide.

As an adjective cerulean

is sky-blue.

As adjectives the difference between cerulean and ceruleous

is that cerulean is sky-blue while ceruleous is (archaic) cerulean; of a deep rich blue colour.

As a noun cerulean

is a greenish-blue color.