Intermediate Blue vs The Fang

How close are they?

ΔE 7.6, close: similar, with a visible difference side by side. The Fang is more saturated, cooler than Intermediate Blue.

Can I use The Fang instead of Intermediate Blue?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). The Fang is more saturated, cooler than Intermediate Blue.

Can I use Intermediate Blue instead of The Fang?

The same difference applies the other way round: Intermediate Blue 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.