Fair Highlights vs Highlight Skin

How close are they?

ΔE 8.9, close: similar, with a visible difference side by side. Highlight Skin is a little lighter, more muted than Fair Highlights.

Can I use Highlight Skin instead of Fair Highlights?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Highlight Skin is a little lighter, more muted than Fair Highlights.

Can I use Fair Highlights instead of Highlight Skin?

The same difference applies the other way round: Fair Highlights is a little darker, 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.