Purple People Eater vs Caledor Sky

How close are they?

ΔE 16.4, loose: different enough that you should pick on purpose. Caledor Sky is a little lighter, cooler than Purple People Eater.

Can I use Caledor Sky instead of Purple People Eater?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Caledor Sky is a little lighter, cooler than Purple People Eater.

Can I use Purple People Eater instead of Caledor Sky?

The same difference applies the other way round: Purple People Eater is a little darker, 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.