The cream would be my last choice for the border just because I don't really like light colored borders that much. Maybe you could find a fabric with some of those colors in it and use a totally different fabric for the border. Like a floral with the blue and yellow colors in it or a retro with those colors. If you use the cream could you maybe do some applique here and there in the colors? I am sure whatever you decide it is going to turn out very nice!