ΔE 12.4, fair: the same colour family, but not a straight swap. Catachan Flesh is warmer than British Uniform Lights.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Catachan Flesh is warmer than British Uniform Lights.
The same difference applies the other way round: British Uniform Lights is 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.
See British Uniform Lights on the colour wheel See Catachan Flesh on the colour wheel
All matches: British Uniform Lights equivalents · Catachan Flesh equivalents