ΔE 14.1, fair: the same colour family, but not a straight swap. Dead Flush is a little darker, more saturated than Combat Fatigues.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Dead Flush is a little darker, more saturated than Combat Fatigues.
The same difference applies the other way round: Combat Fatigues 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 Combat Fatigues on the colour wheel See Dead Flush on the colour wheel
All matches: Combat Fatigues equivalents · Dead Flush equivalents