Yellow Bone vs Highlight Skin

How close are they?

ΔE 6.5, close: similar, with a visible difference side by side. Highlight Skin is more muted, warmer than Yellow Bone.

Can I use Highlight Skin instead of Yellow Bone?

Usually, if you are not matching paint already on the model. Close match (ΔE 6). Highlight Skin is more muted, warmer than Yellow Bone.

Can I use Yellow Bone instead of Highlight Skin?

The same difference applies the other way round: Yellow 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.