River Bed

is a very unsaturated 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

Kabul

# 564C41

or triadic complementary

Cabbage Pont

# 4B5641

and triadic complementary

Matterhorn

# 56414B

To a colorblind person appears

Tundora

# 4b4b4b