Blue

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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Goes well with complementary color

Black Russian

# 000211

or triadic complementary

Black

# 0E0011

and triadic complementary

Swamp

# 00110E

To a colorblind person appears

Cod Gray

# 0b0b0b