What does this need?

I've been working on this canvas off and on for a long time.  So long that, in fact, when I started it I had a definite plan in mind, but I can't remember what it was! So, I've pressed forward and am pretty happy with it. The images are photographs I took of street art in Paris. Fiber paste circles and triangles; cloth buttons, black braid, pen nib and ornate charms; painted red circles and yellow square added for dimension.  But it doesn't feel done to me.  I feel like I need something to pull it all together.  I'm thinking something in white maybe?  And I'm not really loving that shade of blue; it's very dark and there's so much of it.
Ideas gratefully appreciated!