Light Sky Blue vs Voidshield Blue

How close are they?

ΔE 9.7, close: similar, with a visible difference side by side. Voidshield Blue is a little darker, more saturated, warmer than Light Sky Blue.

Can I use Voidshield Blue instead of Light Sky Blue?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Voidshield Blue is a little darker, more saturated, warmer than Light Sky Blue.

Can I use Light Sky Blue instead of Voidshield Blue?

The same difference applies the other way round: Light Sky Blue is a little lighter, more muted, cooler.

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.