ΔE 10.6, fair: the same colour family, but not a straight swap. Red RLM23 is a little darker than Scarlett Red.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Red RLM23 is a little darker than Scarlett Red.
The same difference applies the other way round: Scarlett Red is a little lighter.
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.
See Scarlett Red on the colour wheel See Red RLM23 on the colour wheel
All matches: Scarlett Red equivalents · Red RLM23 equivalents