Tornado Grey vs Thunderous Blue

How close are they?

ΔE 11.7, fair: the same colour family, but not a straight swap. Thunderous Blue is more saturated, cooler than Tornado Grey.

Can I use Thunderous Blue instead of Tornado Grey?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Thunderous Blue is more saturated, cooler than Tornado Grey.

Can I use Tornado Grey instead of Thunderous Blue?

The same difference applies the other way round: Tornado Grey 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.