Blue shampoo bar

[yadonm]

I have a good shampoo bar that I scent with tea tree and color with nettle. I'd like to do one with a natural herbal blue color for grey/white hair. I have Indigo but I'm afraid it might turn into a little old blue hair lady soap. I see that Blue Malva is used in shampoos but I don't know how it would work in cold process soap and it's pretty pricey. Ideas anyone?

 

[Jstar]

Im not sure, but here are a couple interesting links I found:

http://www.mullerslanefarm.com/soapcolors.html

http://crafty.dyskolus.com/coloring/coloring.html