ΔE 3.9, very close: most people won’t see a difference side by side. Umber Wash is warmer than Primer Taupe. They are different kinds of paint: Pro Acryl Primer Taupe is a technical paint or medium and Vallejo Umber Wash is a wash/shade, 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). Umber Wash is warmer than Primer Taupe. They are different kinds of paint.
The same difference applies the other way round: Primer Taupe is cooler.
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 Primer Taupe on the colour wheel See Umber Wash on the colour wheel
All matches: Primer Taupe equivalents · Umber Wash equivalents