Cello

# 1F5666

Boston Blue

# 3797B2

Calypso

is a saturated light cold cyan

Blue is a cool calming color that shows creativity and intelligence. It is a popular color among large corporations, hospitals and airlines. It is a color of loyalty, strength, wisdom and trust. Blue has a calming effect on the psyche. Blue is the color of the sky and the sea and is often used to represent those images.
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Goes well with complementary color

Mule Fawn

# 8C402B

or triadic complementary

Wasabi

# 778C2B

and triadic complementary

Plum

# 8C2B77

To a colorblind person appears

Dove Gray

# 656565