Beige Claire Chanel and Dark Blue denim

Another trick for dark denim in general to help limit rub off (and even save your light leather car seats etc) is when you purchase new denim and even with your old, when you wash them, turn them inside out, use your detergent normally and add a cup of vinegar on top of that. This helps set the color. I would still try the silk scarf trick mentioned above, and if you're going to use any lotions or "potions" on your bag always spot test with a q-tip on the inside of the bag. HTH!!!