How do I remove denim dye from Ugg boots without damaging them?

Some of the dye from a pair of my dark-wash jeans rubbed off onto my Ugg boots, and I'm trying to figure out how to get if off. My only worry is that I'll damage them. How do I remove the dye without making them fade of damaging the sheepskin ? They are chestnut tall, and 100% authentic. Thanks a ton to anyone who answers !! :)