Skink Blue vs Cobalt Teal

How close are they?

ΔE 21.8, loose: different enough that you should pick on purpose. Cobalt Teal is noticeably lighter, more saturated, warmer than Skink Blue.

Can I use Cobalt Teal instead of Skink Blue?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Cobalt Teal is noticeably lighter, more saturated, warmer than Skink Blue.

Can I use Skink Blue instead of Cobalt Teal?

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