Medium Sea Grey vs Typhon Ash

How close are they?

ΔE 8.5, close: similar, with a visible difference side by side. Typhon Ash is a little darker, more muted than Medium Sea Grey.

Can I use Typhon Ash instead of Medium Sea Grey?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Typhon Ash is a little darker, more muted than Medium Sea Grey.

Can I use Medium Sea Grey instead of Typhon Ash?

The same difference applies the other way round: Medium Sea Grey is a little lighter, more saturated.

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.