ΔE 19.6, loose: different enough that you should pick on purpose. Azure is a little darker, much more muted than Cerulean Blue, Chromium.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Azure is a little darker, much more muted than Cerulean Blue, Chromium.
The same difference applies the other way round: Cerulean Blue, Chromium is a little lighter, much 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.
See Cerulean Blue, Chromium on the colour wheel See Azure on the colour wheel
All matches: Cerulean Blue, Chromium equivalents · Azure equivalents