With such a wide outside border, I personally would add something to it. That "something" could be a special quilting design in said border. I usually avoid making any borders wider than 5 1/2 to 6 inches.
Can you make something with your fabric used in the center that show's what the fabric is?
__________________
My newest Grandson, Caleb Austin, was born May 29th. I am now Grandma to 4 precious babies. I am so blessed!!!!