Supposedly they are pearl guineas and that's all I know...lol I saw a couple pics of the adults..they are ...unattractive....lol They all look alike.
The parents probably came from other colors guineas. My keets mainly hatch out pearl but my males are lavender and purple so the keets carry those genes. The next generation could be lavender, purple, and blue. It sounds like he has something similar going on in his flock.