RAL 8013 Rotbraun vs Gal Vorbak Red

How close are they?

ΔE 8.7, close: similar, with a visible difference side by side. Gal Vorbak Red is a little lighter, cooler than RAL 8013 Rotbraun.

Can I use Gal Vorbak Red instead of RAL 8013 Rotbraun?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Gal Vorbak Red is a little lighter, cooler than RAL 8013 Rotbraun.

Can I use RAL 8013 Rotbraun instead of Gal Vorbak Red?

The same difference applies the other way round: RAL 8013 Rotbraun is a little darker, 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.