There is nothing in the photos to make me doubt the authenticity of this bag.
However, it is my opinion that if you are going to sell it that you should pay for a professional authentication from a service like Authenticate4u. (or other similar service) I don't think it's very much (around $25?) and it will give your buyer piece of mind. Much better than the opinion of someone on a purse forum. I think it's a good idea for all sellers to do this and it gives the seller and the item for sale more credibility - not to mention the possibility of a SNAD/fake claim would be less likely.
The bag doesn't really have a formal name and is commonly known as the "fortune cookie bag". It is a staple at the outlets and I think (not 100% fact) that they produce this bag in outlet-specific seasonal colours, so pinpointing a colour is not something I'm able to help you with.