ΔE 4.2, very close: most people won’t see a difference side by side. Off-White is warmer than Interference Blue (Fine). They are different kinds of paint: Golden Interference Blue (Fine) is a pearl paint and Vallejo Off-White 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 4). Off-White is warmer than Interference Blue (Fine). They are different kinds of paint.
The same difference applies the other way round: Interference Blue (Fine) is 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 Interference Blue (Fine) on the colour wheel See Off-White on the colour wheel
All matches: Interference Blue (Fine) equivalents · Off-White equivalents