Mephiston Red vs Firethorn Brown

How close are they?

ΔE 13.7, fair: the same colour family, but not a straight swap. Firethorn Brown is a little lighter, more saturated, warmer than Mephiston Red.

Can I use Firethorn Brown instead of Mephiston Red?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Firethorn Brown is a little lighter, more saturated, warmer than Mephiston Red.

Can I use Mephiston Red instead of Firethorn Brown?

The same difference applies the other way round: Mephiston Red is a little darker, more muted, cooler.

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.