Dioxazine Purple vs Royal Purple

How close are they?

ΔE 17.4, loose: different enough that you should pick on purpose. Royal Purple is a little lighter, much more muted, warmer than Dioxazine Purple.

Can I use Royal Purple instead of Dioxazine Purple?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Royal Purple is a little lighter, much more muted, warmer than Dioxazine Purple.

Can I use Dioxazine Purple instead of Royal Purple?

The same difference applies the other way round: Dioxazine Purple is a little darker, much 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.