ΔE 8.6, close: similar, with a visible difference side by side. Light Sea Blue is more muted than Sky Blue.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Light Sea Blue is more muted than Sky Blue.
The same difference applies the other way round: Sky Blue is more saturated.
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 Sky Blue on the colour wheel See Light Sea Blue on the colour wheel
All matches: Sky Blue equivalents · Light Sea Blue equivalents