Twilight Purple vs Thunderous Blue

How close are they?

ΔE 12.5, fair: the same colour family, but not a straight swap. Thunderous Blue is more muted, cooler than Twilight Purple.

Can I use Thunderous Blue instead of Twilight Purple?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Thunderous Blue is more muted, cooler than Twilight Purple.

Can I use Twilight Purple instead of Thunderous Blue?

The same difference applies the other way round: Twilight Purple is more saturated, 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.