ΔE 14.8, fair: the same colour family, but not a straight swap. Dead Flesh is a little darker, much more saturated than Hykey Yellow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Dead Flesh is a little darker, much more saturated than Hykey Yellow.
The same difference applies the other way round: Hykey Yellow is a little lighter, much 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 Hykey Yellow on the colour wheel See Dead Flesh on the colour wheel
All matches: Hykey Yellow equivalents · Dead Flesh equivalents