Mud Spatter vs Troll Shadow

How close are they?

ΔE 9.7, close: similar, with a visible difference side by side. Troll Shadow is a little lighter, more saturated, cooler than Mud Spatter.

Can I use Troll Shadow instead of Mud Spatter?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Troll Shadow is a little lighter, more saturated, cooler than Mud Spatter.

Can I use Mud Spatter instead of Troll Shadow?

The same difference applies the other way round: Mud Spatter is a little darker, 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.