Fluorescent Red vs Fluorescent Magenta

How close are they?

ΔE 66.2, loose: different enough that you should pick on purpose. Fluorescent Magenta is a little lighter, more muted, cooler than Fluorescent Red.

Can I use Fluorescent Magenta instead of Fluorescent Red?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 66). Fluorescent Magenta is a little lighter, more muted, cooler than Fluorescent Red.

Can I use Fluorescent Red instead of Fluorescent Magenta?

The same difference applies the other way round: Fluorescent Red is a little darker, 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.