Purple Rain vs Calth Blue Clear

How close are they?

ΔE 10.8, fair: the same colour family, but not a straight swap. Calth Blue Clear is a little darker, more saturated, cooler than Purple Rain.

Can I use Calth Blue Clear instead of Purple Rain?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Calth Blue Clear is a little darker, more saturated, cooler than Purple Rain.

Can I use Purple Rain instead of Calth Blue Clear?

The same difference applies the other way round: Purple Rain is a little lighter, 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.