Ebony

# 060B11

Cello

# 233D5E

Big Stone

is a saturated very 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

Mikado

# 382915

or triadic complementary

Seaweed

# 243815

and triadic complementary

Tamarind

# 381524

To a colorblind person appears

Mine Shaft

# 252525