ΔE 8.1, close: similar, with a visible difference side by side. Golden Highlight is a little lighter, cooler than Fair Shadow.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Golden Highlight is a little lighter, cooler than Fair Shadow.
The same difference applies the other way round: Fair Shadow is a little darker, warmer.
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.
See Fair Shadow on the colour wheel See Golden Highlight on the colour wheel
All matches: Fair Shadow equivalents · Golden Highlight equivalents