ΔE 12.4, fair: the same colour family, but not a straight swap. Medium Blue is noticeably darker than Skink Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Medium Blue is noticeably darker than Skink Blue.
The same difference applies the other way round: Skink Blue is noticeably lighter.
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 Skink Blue on the colour wheel See Medium Blue on the colour wheel
All matches: Skink Blue equivalents · Medium Blue equivalents