March Wedding Colors?!?!?!?

I proposed to my fiance on New Years Eve. Yes I`m the groom posting a message! We were originally discussing a Fall wedding in November, but we`re 2nd guessing ourselves for only having 11 months to plan and get financially prepared. So our 2nd date might be March. She likes the idea of a fall wedding with Fall colors. I`m trying to tell her that dark colors (Navy/Burgundy) Any one out there have an opinion if darker fall/winter colors are still appropriate in March.. I say it`s our day and ettiquete doesn`t matter, but I`m the guy so that doesn`t work for her!!! Thanks for the input!!!