Light Blue vs Aqua Alchemy

How close are they?

ΔE 14.3, fair: the same colour family, but not a straight swap. Aqua Alchemy is noticeably darker, warmer than Light Blue.

Can I use Aqua Alchemy instead of Light Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Aqua Alchemy is noticeably darker, warmer than Light Blue.

Can I use Light Blue instead of Aqua Alchemy?

The same difference applies the other way round: Light Blue is noticeably lighter, 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.