ΔE 15.7, loose: different enough that you should pick on purpose. UK Azure Blue is more muted, warmer than Sky Blue.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). UK Azure Blue is more muted, warmer than Sky Blue.
The same difference applies the other way round: Sky Blue is more saturated, 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.
See Sky Blue on the colour wheel See UK Azure Blue on the colour wheel
All matches: Sky Blue equivalents · UK Azure Blue equivalents