Feral Green vs Nuclear Sludge

How close are they?

ΔE 11.8, fair: the same colour family, but not a straight swap. Nuclear Sludge is a little lighter, more muted, cooler than Feral Green.

Can I use Nuclear Sludge instead of Feral Green?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Nuclear Sludge is a little lighter, more muted, cooler than Feral Green.

Can I use Feral Green instead of Nuclear Sludge?

The same difference applies the other way round: Feral Green is a little darker, 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.