Mud Spatter vs Olive-Brown Ops

How close are they?

ΔE 7.9, close: similar, with a visible difference side by side. Olive-Brown Ops is more saturated, cooler than Mud Spatter.

Can I use Olive-Brown Ops instead of Mud Spatter?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Olive-Brown Ops is more saturated, cooler than Mud Spatter.

Can I use Mud Spatter instead of Olive-Brown Ops?

The same difference applies the other way round: Mud Spatter is more muted, 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.