Portland Stone No.64 vs Light Khaki Drill

How close are they?

ΔE 7.0, close: similar, with a visible difference side by side. Light Khaki Drill is more muted, cooler than Portland Stone No.64.

Can I use Light Khaki Drill instead of Portland Stone No.64?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Light Khaki Drill is more muted, cooler than Portland Stone No.64.

Can I use Portland Stone No.64 instead of Light Khaki Drill?

The same difference applies the other way round: Portland Stone No.64 is 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.