ΔE 9.9, close: similar, with a visible difference side by side. Khaki is a little darker, more saturated than Parchment.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Khaki is a little darker, more saturated than Parchment.
The same difference applies the other way round: Parchment 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.
See Parchment on the colour wheel See Khaki on the colour wheel
All matches: Parchment equivalents · Khaki equivalents