Boulder

is a very unsaturated dark warm red

Red is a very strong color. It is a noticeable color that is often used on caution and warning signs. It is often associated with stop or beware. It’s a hot color that evokes a powerful emotion of passion, lust, sex, energy, blood and war.
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Goes well with complementary color

Sirocco

# 737A7A

or triadic complementary

Jumbo

# 73737A

and triadic complementary

Xanadu

# 737A73

To a colorblind person appears

Boulder

# 757575