Ultramarine Blue vs Purple People Eater

How close are they?

ΔE 8.3, close: similar, with a visible difference side by side. Purple People Eater is warmer than Ultramarine Blue.

Can I use Purple People Eater instead of Ultramarine Blue?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Purple People Eater is warmer than Ultramarine Blue.

Can I use Ultramarine Blue instead of Purple People Eater?

The same difference applies the other way round: Ultramarine Blue is 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.