Grey Castle vs Kobold Grey

How close are they?

ΔE 9.6, close: similar, with a visible difference side by side. Kobold Grey is a little darker, more saturated than Grey Castle.

✓ Two Thin Coats comparison chart lists these two as equivalents.

Can I use Kobold Grey instead of Grey Castle?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Kobold Grey is a little darker, more saturated than Grey Castle.

Can I use Grey Castle instead of Kobold Grey?

The same difference applies the other way round: Grey Castle 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.