A variety of skin tones

Easy tabletop recipe

Basecoat: Bugman's Glow
Shade: Reikland Fleshshade
First highlight: Cadian Fleshtone
Final highlight: Kislev Flesh on nose, cheekbones, brow, chin, knuckles
Optional warmth: very thin Carroburg Crimson around lips, cheeks, scars, eye sockets

Pale / grimdark 40k face

Basecoat: Rakarth Flesh + a little Bugman's Glow
Shade: Reikland Fleshshade or thinned Guilliman Flesh
Highlight: Pallid Wych Flesh mixed with Kislev Flesh
Glaze: very thin purple/blue under eyes or around shaved head areas for a tired gothic look

GSC - Human Miners / Brood Brothers

Base: Cadian Fleshtone
Shade: Reikland Fleshshade
Layer: Kislev Flesh
Highlight: Flayed One Flesh
Ideal for 3rd/4th generation hybrids and Brood Brothers
Makes the cult look well hidden within Imperial society

GSC - Pale with Purple Tint (Neophytes)

Base: Rakarth Flesh
Shade: Druchii Violet (thinned)
Layer: Pallid Wych Flesh
Highlight: White mixed into Pallid Wych Flesh
Strong Genestealer aesthetic, immediately recognisable. Works with all generations

GSC - Sickly Grey

Base: Grey Seer
Shade: Apothecary White or thinned Nuln Oil
Highlight: Ulthuan Grey
Looks malnourished and subterranean
Great for horror-themed cults

GSC - Blue-Grey Alien (Aberrants)

Base: The Fang
Shade: Drakenhof Nightshade
Highlight: Russ Grey / Fenrisian Grey
Much more Tyranid-looking
Best reserved for Acolytes, Aberrants and Purestrains