I looked at the Marni website because I have never seen this bag before. Very nice! ....And also VERY big!
No, really, I vote for the mustard. It is gorgeous and would be a surprisingly fabulous neutral.
The yellow is fabulous - I ddin't catch a sale - but here is my dark burgundy baby! BTW, just came back from L.A., where I visited the Marni boutique on Melrose Place. what a gorgeous shop!!
The dark burgundy is also gorgeous! I have seen on their website that they have orange, tobacco and cream for this season, also very nice and "neutral", as Cooper1 appropriately said!