Snow Shadow vs UK Azure Blue

How close are they?

ΔE 9.1, close: similar, with a visible difference side by side. UK Azure Blue is a little lighter, more saturated, warmer than Snow Shadow.

Can I use UK Azure Blue instead of Snow Shadow?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). UK Azure Blue is a little lighter, more saturated, warmer than Snow Shadow.

Can I use Snow Shadow instead of UK Azure Blue?

The same difference applies the other way round: Snow Shadow is a little 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.