ΔE 11.6, fair: the same colour family, but not a straight swap. Blue Green is a little lighter, cooler than Cloud Sea.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Blue Green is a little lighter, cooler than Cloud Sea.
The same difference applies the other way round: Cloud Sea is a little darker, 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 Cloud Sea on the colour wheel See Blue Green on the colour wheel
All matches: Cloud Sea equivalents · Blue Green equivalents