J.N. Green vs Emerald

How close are they?

ΔE 12.2, fair: the same colour family, but not a straight swap. Emerald is noticeably lighter, more saturated than J.N. Green.

Can I use Emerald instead of J.N. Green?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Emerald is noticeably lighter, more saturated than J.N. Green.

Can I use J.N. Green instead of Emerald?

The same difference applies the other way round: J.N. Green is noticeably darker, more muted.

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.