ΔE 8.1, close: similar, with a visible difference side by side. Plague Brown is a little lighter than Khemri Sands.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Plague Brown is a little lighter than Khemri Sands.
The same difference applies the other way round: Khemri Sands is a little darker.
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.
See Khemri Sands on the colour wheel See Plague Brown on the colour wheel
All matches: Khemri Sands equivalents · Plague Brown equivalents