Black

# 000000

Madras

# 2E3500

Cyan / Aqua

is a very saturated very dark warm redish yellow

Yellow is the brightest color to the human eye. It represents youth, fun, happiness, sunshine and other light playful feelings. It is a cheerful energetic color.
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That goes well with

Black Russian

# 02000F

or

Diesel

# 0F000D

and

Swamp

# 000D0F

To a colorblind person appears

Cod Gray

# 090909