Purple vs Fulgrim Pink

How close are they?

ΔE 23.3, loose: different enough that you should pick on purpose. Fulgrim Pink is noticeably lighter, warmer than Purple.

Can I use Fulgrim Pink instead of Purple?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Fulgrim Pink is noticeably lighter, warmer than Purple.

Can I use Purple instead of Fulgrim Pink?

The same difference applies the other way round: Purple is noticeably darker, 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.