Dark Green vs Guardian Green

How close are they?

ΔE 13.8, fair: the same colour family, but not a straight swap. Guardian Green is noticeably lighter, more muted, cooler than Dark Green.

Can I use Guardian Green instead of Dark Green?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Guardian Green is noticeably lighter, more muted, cooler than Dark Green.

Can I use Dark Green instead of Guardian Green?

The same difference applies the other way round: Dark Green is noticeably 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.