Skeleton Bone vs Aged Bone

How close are they?

ΔE 6.8, close: similar, with a visible difference side by side. Aged Bone is more muted, warmer than Skeleton Bone.

Can I use Aged Bone instead of Skeleton Bone?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Aged Bone is more muted, warmer than Skeleton Bone.

Can I use Skeleton Bone instead of Aged Bone?

The same difference applies the other way round: Skeleton Bone is more saturated, 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.