However I had already bought another Sephora number 31 and so I crossed my fingers upon returning the next day that I could exchange it for a number 30 without having the bill.
I was greeted at the door and I explained my dilemma.
"Do you have your beauty insider card? With that we can verify your purchase and there will be no problem"
Sure enough I had the card and was so happy because otherwise it was $25 I wouldn't let go to waste and be forced to use the foundation.
I got the right shade, thanked the young woman at the cash and the one who had greeted me at the door and I was on my way.