Screamer Pink vs Purple Hex

How close are they?

ΔE 9.1, close: similar, with a visible difference side by side. Purple Hex is more muted, cooler than Screamer Pink.

Can I use Purple Hex instead of Screamer Pink?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Purple Hex is more muted, cooler than Screamer Pink.

Can I use Screamer Pink instead of Purple Hex?

The same difference applies the other way round: Screamer Pink is more saturated, 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.