Pale Violet Red vs Deep Magenta

How close are they?

ΔE 8.6, close: similar, with a visible difference side by side. Deep Magenta is a little darker, more saturated, cooler than Pale Violet Red.

Can I use Deep Magenta instead of Pale Violet Red?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Deep Magenta is a little darker, more saturated, cooler than Pale Violet Red.

Can I use Pale Violet Red instead of Deep Magenta?

The same difference applies the other way round: Pale Violet Red is a little lighter, more muted, 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.