ΔE 13.3, fair: the same colour family, but not a straight swap. Techno Green is more muted, cooler than Warpstone Glow. They are different kinds of paint: Citadel Warpstone Glow is an opaque base/layer paint and Scale75 Techno Green is a fluorescent or effect 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 13). Techno Green is more muted, cooler than Warpstone Glow. They are different kinds of paint.
The same difference applies the other way round: Warpstone Glow is more saturated, 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 Warpstone Glow on the colour wheel See Techno Green on the colour wheel
All matches: Warpstone Glow equivalents · Techno Green equivalents