ΔE 16.6, loose: different enough that you should pick on purpose. Sky Blue is a little darker, much more saturated than Artic Blue.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Sky Blue is a little darker, much more saturated than Artic Blue.
The same difference applies the other way round: Artic Blue is a little lighter, much more muted.
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 Artic Blue on the colour wheel See Sky Blue on the colour wheel
All matches: Artic Blue equivalents · Sky Blue equivalents