Ultramarine

# 2C0AB5

Blue

# 3F0FFF

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

Fuego

# B2DB0D

or triadic complementary

Malachite

# 0DDB36

and triadic complementary

Tia Maria

# DB360D

To a colorblind person appears

Scorpion

# 5f5f5f