Periwinkle Purple vs Cygnar Blue Base

How close are they?

ΔE 11.7, fair: the same colour family, but not a straight swap. Cygnar Blue Base is a little darker, more saturated, cooler than Periwinkle Purple. They are different kinds of paint: Army Painter Periwinkle Purple is a one-coat contrast-style paint and Formula P3 Cygnar Blue Base is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.

Can I use Cygnar Blue Base instead of Periwinkle Purple?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Cygnar Blue Base is a little darker, more saturated, cooler than Periwinkle Purple. They are different kinds of paint.

Can I use Periwinkle Purple instead of Cygnar Blue Base?

The same difference applies the other way round: Periwinkle 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.