I think it will look fine. I have made two Surf Songs....one in blue and purple, and one in blue and yellow. I was told the blue and yellow one looked like water on a beach, or sort of. I am going to include pictures of both, in case they help you.
But I wouldn't hesitate to use the fabric you have selected. I am very much in favor of two color quilts, and that is what you will basically have. I always add white to my Bargello designs, as I like the contrast that creates. You might like that too?
I love the Surf Song design.
Dina