Ebony

# 0C0E21

Astronaut

# 282E6D

Port Gore

is a saturated dark cold blue

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

Thatch Green

# 47431A

or triadic complementary

Seaweed

# 1E471A

and triadic complementary

Cocoa Bean

# 471A1E

To a colorblind person appears

Mine Shaft

# 2a2a2a