Intermediate Green vs Sick Green

How close are they?

ΔE 13.6, fair: the same colour family, but not a straight swap. Sick Green is much more saturated than Intermediate Green.

Can I use Sick Green instead of Intermediate Green?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Sick Green is much more saturated than Intermediate Green.

Can I use Intermediate Green instead of Sick Green?

The same difference applies the other way round: Intermediate Green is much 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.