ultramarine

nouns

blue pigment made of powdered lapis lazuli
ultramarine, ultramarine blue
a vivid blue to purple-blue color
ultramarine
is a type of (narrower)
blue color or pigment; resembling the color of the clear sky in the daytime
"he had eyes of bright blue"
blue, blueness

adjectives

of a brilliant pure blue to purplish blue color
ultramarine
is similar to
being or having or characterized by hue
chromatic