Sunset Purple vs Purple

How close are they?

ΔE 17.4, loose: different enough that you should pick on purpose. Purple is a little darker, more muted, cooler than Sunset Purple.

Can I use Purple instead of Sunset Purple?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Purple is a little darker, more muted, cooler than Sunset Purple.

Can I use Sunset Purple instead of Purple?

The same difference applies the other way round: Sunset Purple is a little lighter, more saturated, warmer.

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.