ΔE 10.2, fair: the same colour family, but not a straight swap. Splinter Green is a little lighter, more muted, warmer than British Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Splinter Green is a little lighter, more muted, warmer than British Green.
The same difference applies the other way round: British Green is a little darker, 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.
See British Green on the colour wheel See Splinter Green on the colour wheel
All matches: British Green equivalents · Splinter Green equivalents