ΔE 5.9, very close: most people won’t see a difference side by side. IJN Deep Dark Green is a little darker, cooler than Highland Moss.
Yes, for most jobs. Very close match (ΔE 6). IJN Deep Dark Green is a little darker, cooler than Highland Moss.
The same difference applies the other way round: Highland Moss is a little lighter, 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 Highland Moss on the colour wheel See IJN Deep Dark Green on the colour wheel
All matches: Highland Moss equivalents · IJN Deep Dark Green equivalents