Mars Red vs Pale Carmine Red

How close are they?

ΔE 7.4, close: similar, with a visible difference side by side. Pale Carmine Red is a little lighter, more muted than Mars Red.

Can I use Pale Carmine Red instead of Mars Red?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Pale Carmine Red is a little lighter, more muted than Mars Red.

Can I use Mars Red instead of Pale Carmine Red?

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

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.