Russ Grey vs Elysium Blue

How close are they?

ΔE 8.2, close: similar, with a visible difference side by side. Elysium Blue is more saturated, warmer than Russ Grey.

Can I use Elysium Blue instead of Russ Grey?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Elysium Blue is more saturated, warmer than Russ Grey.

Can I use Russ Grey instead of Elysium Blue?

The same difference applies the other way round: Russ Grey is more muted, cooler.

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.