Twilight Purple vs Regal Blue

How close are they?

ΔE 12.2, fair: the same colour family, but not a straight swap. Regal Blue is a little darker, more saturated, cooler than Twilight Purple.

Can I use Regal Blue instead of Twilight Purple?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Regal Blue is a little darker, more saturated, cooler than Twilight Purple.

Can I use Twilight Purple instead of Regal Blue?

The same difference applies the other way round: Twilight Purple 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.