Fire Red vs Scarlet

How close are they?

ΔE 11.2, fair: the same colour family, but not a straight swap. Scarlet is a little lighter, more saturated, warmer than Fire Red.

Can I use Scarlet instead of Fire Red?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Scarlet is a little lighter, more saturated, warmer than Fire Red.

Can I use Fire Red instead of Scarlet?

The same difference applies the other way round: Fire 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.