Hi,
I agree with lorritcat about black background. Would really make those colors "pop"!
But YOU are the one that is doing the cross stitching work so other colors you like will work just as well.
I'm a bit prejudice when it comes to using black fabric on some patterns, even with bad eyes (cataracts). I love using black fabric, though I do my black on 28-count (bad eyes or not!)
Let us know what background color you decide! Whatever background color you choose, it's sure to be a beautiful design when you have it finished!