Thunderous Blue vs Twilight Blue

How close are they?

ΔE 9.8, close: similar, with a visible difference side by side. Twilight Blue is a little darker, more muted than Thunderous Blue.

Can I use Twilight Blue instead of Thunderous Blue?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Twilight Blue is a little darker, more muted than Thunderous Blue.

Can I use Thunderous Blue instead of Twilight Blue?

The same difference applies the other way round: Thunderous Blue is a little lighter, more saturated.

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.