Night Blood vs Rebel Red

How close are they?

ΔE 16.7, loose: different enough that you should pick on purpose. Rebel Red is a little darker, much more saturated, cooler than Night Blood.

Can I use Rebel Red instead of Night Blood?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Rebel Red is a little darker, much more saturated, cooler than Night Blood.

Can I use Night Blood instead of Rebel Red?

The same difference applies the other way round: Night Blood is a little lighter, much more muted, 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.