ΔE 12.5, fair: the same colour family, but not a straight swap. Eldar Flesh is a little darker, more saturated than Urban Buff.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Eldar Flesh is a little darker, more saturated than Urban Buff.
The same difference applies the other way round: Urban Buff 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 Urban Buff on the colour wheel See Eldar Flesh on the colour wheel
All matches: Urban Buff equivalents · Eldar Flesh equivalents