Chancellor Blue vs Royal Purple

How close are they?

ΔE 11.8, fair: the same colour family, but not a straight swap. Royal Purple is noticeably darker, warmer than Chancellor Blue.

Can I use Royal Purple instead of Chancellor Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Royal Purple is noticeably darker, warmer than Chancellor Blue.

Can I use Chancellor Blue instead of Royal Purple?

The same difference applies the other way round: Chancellor 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.