Slaughter Red vs Health Red

How close are they?

ΔE 23.8, loose: different enough that you should pick on purpose. Health Red is a little lighter, much more saturated, warmer than Slaughter Red.

Can I use Health Red instead of Slaughter Red?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 24). Health Red is a little lighter, much more saturated, warmer than Slaughter Red.

Can I use Slaughter Red instead of Health Red?

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