I ordered the carpeted floor mats for my frost interior Maxima. My mom,s car is the same light color and here mats are dirty as heck. I just recommend that you "sell the dealer" the carpted floor mats and take the rubber ones which are easier to keep clean and also clean. Also, the carpeted mats are like 120 bucks and the rubber ones are like 70 so ask the dealer to give you some Guenuine accessories like wheel locks (look on nissanusa.com)
I will get my car in like 2 weeks but I have talked the dealer about it and he has showed some interest. Hope it goes well with you.

 

another way is buy some carpet protector from Home Depot, the cheapest is 48 cents per foot.