Flag Red vs Scab Red

How close are they?

ΔE 11.6, fair: the same colour family, but not a straight swap. Scab Red is a little darker, more muted than Flag Red.

Can I use Scab Red instead of Flag Red?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Scab Red is a little darker, more muted than Flag Red.

Can I use Flag Red instead of Scab Red?

The same difference applies the other way round: Flag Red is a little lighter, 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.