Feywild Glow vs Cloudy Sky

How close are they?

ΔE 9.5, close: similar, with a visible difference side by side. Cloudy Sky is a little darker, more muted than Feywild Glow.

Can I use Cloudy Sky instead of Feywild Glow?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Cloudy Sky is a little darker, more muted than Feywild Glow.

Can I use Feywild Glow instead of Cloudy Sky?

The same difference applies the other way round: Feywild Glow is a little lighter, 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.