ΔE 11.2, fair: the same colour family, but not a straight swap. Sick Green is a little lighter, more saturated than Orruk Flesh.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Sick Green is a little lighter, more saturated than Orruk Flesh.
The same difference applies the other way round: Orruk Flesh is a little darker, 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.
See Orruk Flesh on the colour wheel See Sick Green on the colour wheel
All matches: Orruk Flesh equivalents · Sick Green equivalents