Seraphon Blue vs Foul Green

How close are they?

ΔE 13.2, fair: the same colour family, but not a straight swap. Foul Green is a little lighter, warmer than Seraphon Blue.

Can I use Foul Green instead of Seraphon Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Foul Green is a little lighter, warmer than Seraphon Blue.

Can I use Seraphon Blue instead of Foul Green?

The same difference applies the other way round: Seraphon Blue is a little darker, 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.