Ancient Stone vs Bone

How close are they?

ΔE 7.0, close: similar, with a visible difference side by side. Bone is a little darker, more muted than Ancient Stone.

Can I use Bone instead of Ancient Stone?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Bone is a little darker, more muted than Ancient Stone.

Can I use Ancient Stone instead of Bone?

The same difference applies the other way round: Ancient Stone is a little lighter, more saturated.

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.