ΔE 12.3, fair: the same colour family, but not a straight swap. Light Sea Blue is a little lighter, more saturated than Ice Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Light Sea Blue is a little lighter, more saturated than Ice Blue.
The same difference applies the other way round: Ice Blue is a little darker, 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 Ice Blue on the colour wheel See Light Sea Blue on the colour wheel
All matches: Ice Blue equivalents · Light Sea Blue equivalents