Air Superiority Blue FS 35450 vs Sky Blue

How close are they?

ΔE 9.8, close: similar, with a visible difference side by side. Sky Blue is more saturated, warmer than Air Superiority Blue FS 35450.

Can I use Sky Blue instead of Air Superiority Blue FS 35450?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Sky Blue is more saturated, warmer than Air Superiority Blue FS 35450.

Can I use Air Superiority Blue FS 35450 instead of Sky Blue?

The same difference applies the other way round: Air Superiority Blue FS 35450 is 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.