ΔE 7.0, close: similar, with a visible difference side by side. Ivory is a little lighter, warmer than Khaki Highlight.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Ivory is a little lighter, warmer than Khaki Highlight.
The same difference applies the other way round: Khaki Highlight is a little darker, cooler.
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 Khaki Highlight on the colour wheel See Ivory on the colour wheel
All matches: Khaki Highlight equivalents · Ivory equivalents