Shuttle Gray

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

Pine Cone

# 665E59

or triadic complementary

Siam

# 606659

and triadic complementary

Scorpion

# 665960

To a colorblind person appears

Scorpion

# 606060