Prussian Blue

# 01294C

Congress Blue

# 035399

Regal Blue

is a very 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

Red Beech

# 723602

or triadic complementary

Verdun Green

# 3E7202

and triadic complementary

Siren

# 72023E

To a colorblind person appears

Mine Shaft

# 3b3b3b