ΔE 13.4, fair: the same colour family, but not a straight swap. Dead Flesh is noticeably lighter, more saturated, cooler than Flak Gun Yellow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Dead Flesh is noticeably lighter, more saturated, cooler than Flak Gun Yellow.
The same difference applies the other way round: Flak Gun Yellow is noticeably darker, 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 Flak Gun Yellow on the colour wheel See Dead Flesh on the colour wheel
All matches: Flak Gun Yellow equivalents · Dead Flesh equivalents