I had color transfer from a black blazer onto a light colored garden party that was awful. The garden party never fully recovered and I was so pissed off at the blazer that I never wore it again.
Seriously though it was my own fault, the blazer was new and had not been dry cleaned. I am now extremely careful in mixing light colored bags with dark clothing.
Audreylita, sorry to hear about your garden party. I'm a jeans girl and ruined the backside of a petal pink BV crossbody bag, which is why I asked this question. I always remind myself that it's okay because I'm not planning to resell the bag and no one sees the backside anyway... But with a Kelly (and any handheld bag, really), I feel like there's more opportunity to show the back of the bag and I really don't want to risk it. I may just have to invest in some other pants and dresses instead...