ΔE 4.9, very close: most people won’t see a difference side by side. Light Blue Green is cooler than Nihilakh Oxide. They are different kinds of paint: Citadel Nihilakh Oxide is a technical paint or medium and Vallejo Light Blue Green is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.
Yes, for most jobs. Very close match (ΔE 5). Light Blue Green is cooler than Nihilakh Oxide. They are different kinds of paint.
The same difference applies the other way round: Nihilakh Oxide is warmer.
ΔE is the colour difference between our two swatch estimates: under 2 is a perfect match (you’d struggle to tell them apart), under 6 very close, under 10 close, under 15 fair, under 20 loose, under 30 very loose, and 30 or more a poor match. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Nihilakh Oxide on the colour wheel See Light Blue Green on the colour wheel
All matches: Nihilakh Oxide equivalents · Light Blue Green equivalents