Cobalt Bluegreen vs Sky Blue

How close are they?

ΔE 12.6, fair: the same colour family, but not a straight swap. Sky Blue is a little darker, cooler than Cobalt Bluegreen.

Can I use Sky Blue instead of Cobalt Bluegreen?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Sky Blue is a little darker, cooler than Cobalt Bluegreen.

Can I use Cobalt Bluegreen instead of Sky Blue?

The same difference applies the other way round: Cobalt Bluegreen is a little lighter, warmer.

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.