Skeleton Bone vs Aged White

How close are they?

ΔE 8.2, close: similar, with a visible difference side by side. Aged White is a little lighter, more saturated than Skeleton Bone.

Can I use Aged White instead of Skeleton Bone?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Aged White is a little lighter, more saturated than Skeleton Bone.

Can I use Skeleton Bone instead of Aged White?

The same difference applies the other way round: Skeleton Bone is a little darker, more muted.

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.