Cantabric Blue vs Medium Blue

How close are they?

ΔE 12.2, fair: the same colour family, but not a straight swap. Medium Blue is more saturated, warmer than Cantabric Blue.

Can I use Medium Blue instead of Cantabric Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Medium Blue is more saturated, warmer than Cantabric Blue.

Can I use Cantabric Blue instead of Medium Blue?

The same difference applies the other way round: Cantabric Blue is 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.