ΔE 11.0, fair: the same colour family, but not a straight swap. Viridian Green Hue is a little lighter, cooler than Dark Angels Green. They are different kinds of paint: Citadel Dark Angels Green is a one-coat contrast-style paint and Golden Viridian Green Hue 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). Viridian Green Hue is a little lighter, cooler than Dark Angels Green. They are different kinds of paint.
The same difference applies the other way round: Dark Angels Green is a little darker, 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.
See Dark Angels Green on the colour wheel See Viridian Green Hue on the colour wheel
All matches: Dark Angels Green equivalents · Viridian Green Hue equivalents