Swamp

# 001B1E

Blue Stone

# 005E6B

Cyprus

is a very saturated dark cold bluish 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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That goes well with

Bean

# 440800

or

Verdun Green

# 3C4400

and

Blackberry

# 44003C

To a colorblind person appears

Mine Shaft

# 2b2b2b