Much to my dismay (and ignorance) my purple pigment powder morphed into gray/green in my soap. Still smells great (BB Lavender) but is very ugly. Debating my options.....
It's still pretty - just not purple! I'll be soaping with some red pigment in a week or two and I too am wondering how it will come out in Castile soap...(and if it will come out all over my washcloth )
You could rebatch it once you figure out what to use to make it purple, or just leave it as is, it is still pretty – just not the right type of pretty you were going for.