This might sound a little ignorant, but what exactly does color transfer mean when it comes to patent leather? For regular leather, I would think that color from your jeans would rub onto the leather, but for patent, isn't there some sort of protective layer protecting the leather underneath?
With white and light colored patent leather dark colors can stain the purse. I don't have a photo but when it happens it appears that the stain is under the shininess. Its very odd and I'm not sure why it happens but I would be wary of light patent leather, because once the stain is there it can be removed.