Dirt vs Gorthor Brown

How close are they?

ΔE 12.1, fair: the same colour family, but not a straight swap. Gorthor Brown is noticeably darker, more saturated, warmer than Dirt. They are different kinds of paint: AMMO by Mig Dirt is an ink, glaze or transparent paint and Citadel Gorthor Brown is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.

Can I use Gorthor Brown instead of Dirt?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Gorthor Brown is noticeably darker, more saturated, warmer than Dirt. They are different kinds of paint.

Can I use Dirt instead of Gorthor Brown?

The same difference applies the other way round: Dirt is noticeably lighter, more muted, 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.