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