Redrum vs Ruby Red

How close are they?

ΔE 17.1, loose: different enough that you should pick on purpose. Ruby Red is noticeably lighter, more muted than Redrum.

Can I use Ruby Red instead of Redrum?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Ruby Red is noticeably lighter, more muted than Redrum.

Can I use Redrum instead of Ruby Red?

The same difference applies the other way round: Redrum is noticeably darker, more saturated.

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.