Outer Space

# 2B3333

Sirocco

# 6C7F7F

Nandor

is a very unsaturated 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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Goes well with complementary color

Don Juan

# 594B4B

or triadic complementary

Fuscous Gray

# 59594B

and triadic complementary

Don Juan

# 594B59

To a colorblind person appears

Emperor

# 555555