Chimera Red vs Dark Crimson

How close are they?

ΔE 8.6, close: similar, with a visible difference side by side. Dark Crimson is more saturated, warmer than Chimera Red.

Can I use Dark Crimson instead of Chimera Red?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Dark Crimson is more saturated, warmer than Chimera Red.

Can I use Chimera Red instead of Dark Crimson?

The same difference applies the other way round: Chimera Red is 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.