Typhon Ash vs Cement Grey

How close are they?

ΔE 7.9, close: similar, with a visible difference side by side. Cement Grey is more saturated than Typhon Ash.

Can I use Cement Grey instead of Typhon Ash?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Cement Grey is more saturated than Typhon Ash.

Can I use Typhon Ash instead of Cement Grey?

The same difference applies the other way round: Typhon Ash is more muted.

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.