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