Color Dilemma

A few weeks ago I talked Andy into purchasing this:

We found it at the J.C. Penny Outlet near our house and I LOVED it for our guest room. It was only $40 so I was so excited. Only thing I don't love is the color. It doesn't vibe with what I'm going for in the guest room. I'm going for greens and yellows, wild flowers, glass milk bottles, natural, homey, with just a touch of modern. We have an IKEA bed that was mine from my single gal days, so that's our modern.

Pretty cool looking duvet cover. 

 Wild flower arrangement for top of cabinet.

So my problem is that I'm not really sure what color to paint the cabinet. We've looked at yellow and green samples but everything looks good in theory and on a 2 inch card but how will it look in the new house in the guest room. Should we go with green for the cabinet and do yellow walls? Should we do white walls and do a yellow cabinet? What shade should we go with, light green, dark green, light yellow or more mustard? Any help/opinions would be seriously appreciated!