March of the Fire Ants vs Charred Brown

How close are they?

ΔE 18.3, loose: different enough that you should pick on purpose. Charred Brown is noticeably darker, more saturated, cooler than March of the Fire Ants.

Can I use Charred Brown instead of March of the Fire Ants?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Charred Brown is noticeably darker, more saturated, cooler than March of the Fire Ants.

Can I use March of the Fire Ants instead of Charred Brown?

The same difference applies the other way round: March of the Fire Ants is noticeably lighter, more muted, 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.