Hot Pink vs Majin Pink

How close are they?

ΔE 16.6, loose: different enough that you should pick on purpose. Majin Pink is a little lighter, more saturated, warmer than Hot Pink.

Can I use Majin Pink instead of Hot Pink?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Majin Pink is a little lighter, more saturated, warmer than Hot Pink.

Can I use Hot Pink instead of Majin Pink?

The same difference applies the other way round: Hot Pink is a little darker, more muted, 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.