It looks ok, though I would be a bit cautious because it's a fairly new seller without a lot of feedback. If you decide to buy, be sure to pay with a credit card through Paypal to be safe.
Color can be affected by any number of things: lighting, camera, use of the flash.
Here's another bag in the same color from a reputable seller. It shows the same color scheme:
http://cgi.ebay.com/Coach-12943-Mad...emQQptZUS_CSA_WH_Handbags?hash=item4cec6e53f5
Thank you so much ! =] I'll probably buy from the person above