ΔE 9.8, close: similar, with a visible difference side by side. Black Wash is a little darker than Oblivion Black Wash.
✓ Two Thin Coats comparison chart lists these two as equivalents.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Black Wash is a little darker than Oblivion Black Wash.
The same difference applies the other way round: Oblivion Black Wash is a little lighter.
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 Oblivion Black Wash on the colour wheel See Black Wash on the colour wheel
All matches: Oblivion Black Wash equivalents · Black Wash equivalents