Doombull Brown vs Blackened Brown

How close are they?

ΔE 8.5, close: similar, with a visible difference side by side. Blackened Brown is more muted, warmer than Doombull Brown.

Can I use Blackened Brown instead of Doombull Brown?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Blackened Brown is more muted, warmer than Doombull Brown.

Can I use Doombull Brown instead of Blackened Brown?

The same difference applies the other way round: Doombull Brown is more saturated, 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.