Purple/Blue Color from Grocery Store?

[BrewerGeorge]

My next soap is going to be scented with green tea and lavender FO. I'd planned on just making yellow (like the tea) with clay, but I spent last night looking at videos about swirling, so I'm considering giving it a try.

Problem is that I don't have any purple or blue colorants to mimic the lavender side of the scent, and I don't want to wait ten days for another shipment (nor pay special shipping just for this).

Is there anything that I can buy at a grocery store or similar which will give me a purplish color?

 

[cmzaha]

Blue food coloring will usually morph to purple. If it tells you it is Blue Lake 1 that is the one you want.