ΔE 4.3, very close: most people won’t see a difference side by side. Refractive Green is a little lighter, warmer than WWI French Green 1.
Yes, for most jobs. Very close match (ΔE 4). Refractive Green is a little lighter, warmer than WWI French Green 1.
The same difference applies the other way round: WWI French Green 1 is a little darker, 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 WWI French Green 1 on the colour wheel See Refractive Green on the colour wheel
All matches: WWI French Green 1 equivalents · Refractive Green equivalents