Rock

is a 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

Limed Spruce

# 354E4F

or triadic complementary

Martinique

# 36354F

and triadic complementary

Tom Thumb

# 354F36

To a colorblind person appears

Mine Shaft

# 3f3f3f