Calgar Blue vs Leviathan Blue

How close are they?

ΔE 11.3, fair: the same colour family, but not a straight swap. Leviathan Blue is noticeably lighter, cooler than Calgar Blue.

Can I use Leviathan Blue instead of Calgar Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Leviathan Blue is noticeably lighter, cooler than Calgar Blue.

Can I use Calgar Blue instead of Leviathan Blue?

The same difference applies the other way round: Calgar Blue is noticeably darker, warmer.

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.