Ushabti Bone vs Khaki Bone

How close are they?

ΔE 7.2, close: similar, with a visible difference side by side. Khaki Bone is a little lighter than Ushabti Bone.

Can I use Khaki Bone instead of Ushabti Bone?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Khaki Bone is a little lighter than Ushabti Bone.

Can I use Ushabti Bone instead of Khaki Bone?

The same difference applies the other way round: Ushabti Bone is a little darker.

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.