Black Rock

is a very saturated very 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

Madras

# 393A04

or triadic complementary

English Holly

# 043A05

and triadic complementary

Burnt Maroon

# 3A0504

To a colorblind person appears

Cod Gray

# 161616