Portland Stone No.64 vs Morghast Bone

How close are they?

ΔE 9.5, close: similar, with a visible difference side by side. Morghast Bone is a little darker, more muted, cooler than Portland Stone No.64.

Can I use Morghast Bone instead of Portland Stone No.64?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Morghast Bone is a little darker, more muted, cooler than Portland Stone No.64.

Can I use Portland Stone No.64 instead of Morghast Bone?

The same difference applies the other way round: Portland Stone No.64 is a little lighter, more saturated, warmer.

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.