ΔE 11.5, fair: the same colour family, but not a straight swap. Clear Viridian is a little darker, more saturated, warmer than Kabalite Green. They are different kinds of paint: Citadel Kabalite Green is an opaque base/layer paint and Reaper Clear Viridian is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Clear Viridian is a little darker, more saturated, warmer than Kabalite Green. They are different kinds of paint.
The same difference applies the other way round: Kabalite Green is a little lighter, more muted, 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.
See Kabalite Green on the colour wheel See Clear Viridian on the colour wheel
All matches: Kabalite Green equivalents · Clear Viridian equivalents