Rotten Green vs Bright Green

How close are they?

ΔE 14.5, fair: the same colour family, but not a straight swap. Bright Green is a little darker, more muted, cooler than Rotten Green.

Can I use Bright Green instead of Rotten Green?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Bright Green is a little darker, more muted, cooler than Rotten Green.

Can I use Rotten Green instead of Bright Green?

The same difference applies the other way round: Rotten Green is a little lighter, more saturated, 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.