March of the Fire Ants vs Thondia Brown

How close are they?

ΔE 17.3, loose: different enough that you should pick on purpose. Thondia Brown is noticeably darker, more saturated than March of the Fire Ants.

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

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Thondia Brown is noticeably darker, more saturated than March of the Fire Ants.

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

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

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.