The color is so unexpected. Not quite a navy blue, certainly not a pastel blue; cobalt blue is in its own league. My fave way to wear it? A hint of blue poking out either with a cobalt cami under a cardigan or with some groovy looking platform pumps with some casual jeans. Or even with a LBD (little black dress for the fashion un-savvy).
Payless has a great pair that they are practically giving away for $16.99 so you have no excuse to jump on the blue train of delightful fashion.
Mind you, they are flip flops, in a sense, but also they are chic and look vaguely like a wedge/heel combo.
They would look adorable with some khaki capris. Enjoy!