Kelp

is a very unsaturated dark warm greenish 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

Ship Gray

# 3F3D47

or triadic complementary

# 473D45

and triadic complementary

# 3D4547

To a colorblind person appears

# 444444