Ultramarine

# 0F0893

Blue

# 180DE0

Dark Blue

is a very saturated 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

La Rioja

# B1BA0B

or triadic complementary

Malachite

# 0BBA13

and triadic complementary

Milano Red

# BA130B

To a colorblind person appears

Tundora

# 484848