Black

# 000000

Stratos

# 000433

Black Russian

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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That goes well with

Nero

# 0C0B00

or

Deep Fir

# 010C00

and

Diesel

# 0C0001

To a colorblind person appears

Black

# 040404