Charade

# 21212D

Comet

# 59597A

Gun Powder

is a unsaturated dark 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

Kelp

# 54543D

or triadic complementary

Tom Thumb

# 3D543D

and triadic complementary

Matterhorn

# 543D3D

To a colorblind person appears

Tundora

# 454545