I prefere elves with human flesh toned skin, but its personal preference.
If using GW paints
Undercoat black
Do eyes
basecoat of tanned flesh, leaving thin line of black round eyes hair helmet line etc
mix a bit of elf flesh in with tanned flesh, and build up highlights
elf flesh on high spots leaving creases a darker colour
elf flesh and a bit of white for final highlighting
leave the tanned flesh on the bottom lip.
That should give you a decent flesh colour to start with. Make sure you water the paint down then use only a little paint after wipping excess on a paper towel.
Good luck, and I like the colour scheme on your dark elves