Wolven Grey vs Liquid Mask

How close are they?

ΔE 16.3, loose: different enough that you should pick on purpose. Liquid Mask is noticeably lighter, more muted than Wolven Grey.

Can I use Liquid Mask instead of Wolven Grey?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Liquid Mask is noticeably lighter, more muted than Wolven Grey.

Can I use Wolven Grey instead of Liquid Mask?

The same difference applies the other way round: Wolven Grey is noticeably darker, more saturated.

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.