I had a pretty black-haired girl with a streak of gray in her hair. I crossed her with a dark-haired guy and the baby was a grey-haired kid. I was freaked out at first, and thought maybe it was because Mom had eaten some bad stew while nursing! But every baby from that Mom came out grey-haired, and those grey-haired genes were tenacious! Half my island was grey. I ended up starting a new tribe partly because of wanting some prettier hair. I mean really...I dye my own hair to get rid of the grey!