Reddish Grey vs Ammo Pouch Brown

How close are they?

ΔE 7.6, close: similar, with a visible difference side by side. Ammo Pouch Brown is a little darker, warmer than Reddish Grey.

Can I use Ammo Pouch Brown instead of Reddish Grey?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Ammo Pouch Brown is a little darker, warmer than Reddish Grey.

Can I use Reddish Grey instead of Ammo Pouch Brown?

The same difference applies the other way round: Reddish Grey is a little lighter, 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.