ΔE 9.9, close: similar, with a visible difference side by side. UK Azure Blue is a little darker, more muted, cooler than Baron Blue.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). UK Azure Blue is a little darker, more muted, cooler than Baron Blue.
The same difference applies the other way round: Baron Blue is a little lighter, more saturated, 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.
See Baron Blue on the colour wheel See UK Azure Blue on the colour wheel
All matches: Baron Blue equivalents · UK Azure Blue equivalents