Amethyst Rayne vs Flat Blue

How close are they?

ΔE 10.3, fair: the same colour family, but not a straight swap. Flat Blue is more saturated, cooler than Amethyst Rayne.

Can I use Flat Blue instead of Amethyst Rayne?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Flat Blue is more saturated, cooler than Amethyst Rayne.

Can I use Amethyst Rayne instead of Flat Blue?

The same difference applies the other way round: Amethyst Rayne is 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.