Resplendent Red vs Emperor Red

How close are they?

ΔE 13.4, fair: the same colour family, but not a straight swap. Emperor Red is a little lighter, more muted, cooler than Resplendent Red.

Can I use Emperor Red instead of Resplendent Red?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Emperor Red is a little lighter, more muted, cooler than Resplendent Red.

Can I use Resplendent Red instead of Emperor Red?

The same difference applies the other way round: Resplendent Red is a little darker, 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.