Volupus Pink vs Plasma Red

How close are they?

ΔE 41.7, loose: different enough that you should pick on purpose. Plasma Red is noticeably darker, more muted, warmer than Volupus Pink.

Can I use Plasma Red instead of Volupus Pink?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 42). Plasma Red is noticeably darker, more muted, warmer than Volupus Pink.

Can I use Volupus Pink instead of Plasma Red?

The same difference applies the other way round: Volupus Pink is noticeably lighter, 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.