Pyrrole Red Light vs Light Red

How close are they?

ΔE 12.5, fair: the same colour family, but not a straight swap. Light Red is much more muted than Pyrrole Red Light.

Can I use Light Red instead of Pyrrole Red Light?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Light Red is much more muted than Pyrrole Red Light.

Can I use Pyrrole Red Light instead of Light Red?

The same difference applies the other way round: Pyrrole Red Light is much 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.