Legendary Red vs C.P. Cadmium Red Medium

How close are they?

ΔE 7.8, close: similar, with a visible difference side by side. C.P. Cadmium Red Medium is a little darker than Legendary Red.

Can I use C.P. Cadmium Red Medium instead of Legendary Red?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). C.P. Cadmium Red Medium is a little darker than Legendary Red.

Can I use Legendary Red instead of C.P. Cadmium Red Medium?

The same difference applies the other way round: Legendary Red is a little lighter.

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.