Witchbane Plum vs Deep Magenta

How close are they?

ΔE 8.3, close: similar, with a visible difference side by side. Deep Magenta is a little lighter, more muted than Witchbane Plum.

Can I use Deep Magenta instead of Witchbane Plum?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Deep Magenta is a little lighter, more muted than Witchbane Plum.

Can I use Witchbane Plum instead of Deep Magenta?

The same difference applies the other way round: Witchbane Plum 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.