Skink Blue vs Wolven Grey

How close are they?

ΔE 24.5, loose: different enough that you should pick on purpose. Wolven Grey is noticeably lighter, much more muted than Skink Blue.

Can I use Wolven Grey instead of Skink Blue?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 25). Wolven Grey is noticeably lighter, much more muted than Skink Blue.

Can I use Skink Blue instead of Wolven Grey?

The same difference applies the other way round: Skink Blue is noticeably darker, much 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.