ΔE 22.1, loose: different enough that you should pick on purpose. Fire Red is much more muted, cooler than Brown Skin.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Fire Red is much more muted, cooler than Brown Skin.
The same difference applies the other way round: Brown Skin is much more saturated, warmer.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Brown Skin on the colour wheel See Fire Red on the colour wheel
All matches: Brown Skin equivalents · Fire Red equivalents