ΔE 13.0, fair: the same colour family, but not a straight swap. Skink Blue is a little darker, cooler than Deep Sky Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Skink Blue is a little darker, cooler than Deep Sky Blue.
The same difference applies the other way round: Deep Sky Blue is a little lighter, 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 Deep Sky Blue on the colour wheel See Skink Blue on the colour wheel
All matches: Deep Sky Blue equivalents · Skink Blue equivalents