Synonyms for Cyan:

adj.

blue (adjective)
indigo, peacock, marine blue, cobalt, azure, baby blue, lavender, navy, cadet blue, powder blue, sapphire, turquoise, ultramarine, midnight blue, cornflower, robin's egg blue, blue, aquamarine.

n.

colors (noun)
biscuit, blackness, aqua, bronze, apricot, buff, black, brown.
cyan (noun)
teal, blue-green, bluish green, chromatic.

Other synonyms:

Other relevant words:
teal, blue-green, bluish green, chromatic.