Ultramar Blue vs Midnight Purple

How close are they?

ΔE 11.9, fair: the same colour family, but not a straight swap. Midnight Purple is more muted, warmer than Ultramar Blue.

Can I use Midnight Purple instead of Ultramar Blue?

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

Can I use Ultramar Blue instead of Midnight Purple?

The same difference applies the other way round: Ultramar Blue is more saturated, 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.