Ultramarine

# 2603A5

Blue

# 3804F2

Dark Blue

is a very saturated very light 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

Pistachio

# A0CC04

or triadic complementary

Malachite

# 04CC2F

and triadic complementary

Grenadier

# CC2F04

To a colorblind person appears

Scorpion

# 565656