ΔE 7.6, close: similar, with a visible difference side by side. USAAF Light Gray is a little lighter, cooler than Rakarth Flesh.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). USAAF Light Gray is a little lighter, cooler than Rakarth Flesh.
The same difference applies the other way round: Rakarth Flesh is a little darker, 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 Rakarth Flesh on the colour wheel See USAAF Light Gray on the colour wheel
All matches: Rakarth Flesh equivalents · USAAF Light Gray equivalents