ΔE 10.6, fair: the same colour family, but not a straight swap. Skyrat is noticeably darker than Cobalt Metal.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Skyrat is noticeably darker than Cobalt Metal.
The same difference applies the other way round: Cobalt Metal 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 Cobalt Metal on the colour wheel See Skyrat on the colour wheel
All matches: Cobalt Metal equivalents · Skyrat equivalents