Candace, what cute pieces! I LOVE those shoes and think they will look awesome with the navy top and pale blue skirt.
I can't find a reference, but I think I recall Angie saying that for bright accent colors, her general rule of thumb is to have no more than two items of the same color in the same outfit to avoid looking too matchy-matchy. (Am I remembering correctly?)
My sense is that you will probably be okay if you don't add a second piece of yellow because the shoes will be eye-catching enough on their own, but I'd like to hear what the experts suggest.