Dark Ghost Grey FS 36320 vs Tanker Grey

How close are they?

ΔE 6.9, close: similar, with a visible difference side by side. Tanker Grey is a little darker, more saturated than Dark Ghost Grey FS 36320.

Can I use Tanker Grey instead of Dark Ghost Grey FS 36320?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Tanker Grey is a little darker, more saturated than Dark Ghost Grey FS 36320.

Can I use Dark Ghost Grey FS 36320 instead of Tanker Grey?

The same difference applies the other way round: Dark Ghost Grey FS 36320 is a little lighter, 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.