Ultramar Blue vs Blue Violet

How close are they?

ΔE 12.2, fair: the same colour family, but not a straight swap. Blue Violet is a little lighter, more saturated than Ultramar Blue.

Can I use Blue Violet instead of Ultramar Blue?

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

Can I use Ultramar Blue instead of Blue Violet?

The same difference applies the other way round: Ultramar Blue is a little darker, more muted.

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.