Ebony

# 090F1C

Cello

# 243B68

Big Stone

is a saturated dark cold azure

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

Metallic Bronze

# 423317

or triadic complementary

Seaweed

# 254217

and triadic complementary

Cocoa Bean

# 421725

To a colorblind person appears

Mine Shaft

# 2a2a2a