ΔE 8.4, close: similar, with a visible difference side by side. Hemp BS4800/10B21 is more saturated, cooler than Dark Imperial Khaki.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Hemp BS4800/10B21 is more saturated, cooler than Dark Imperial Khaki.
The same difference applies the other way round: Dark Imperial Khaki is more muted, 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.
See Dark Imperial Khaki on the colour wheel See Hemp BS4800/10B21 on the colour wheel
All matches: Dark Imperial Khaki equivalents · Hemp BS4800/10B21 equivalents