Uniform Grey vs Slaanesh Grey

How close are they?

ΔE 10.0, close: similar, with a visible difference side by side. Slaanesh Grey is a little lighter, more saturated, warmer than Uniform Grey.

Can I use Slaanesh Grey instead of Uniform Grey?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Slaanesh Grey is a little lighter, more saturated, warmer than Uniform Grey.

Can I use Uniform Grey instead of Slaanesh Grey?

The same difference applies the other way round: Uniform Grey is a little darker, 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.