It's still OK to wear darker colors during the warmer months. Just remember to add them with contrasting shades of color and patterns. Keep away from making you look morbid. I'm sure it's not too difficult for you ladies to keep in touch with the contrast.
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Topshop structured blazer (lemon)

D&G black cotton jersey vest top

Dorothy Perkins black white tapered pants

Tory Burch - Beverly pump

Kate Spade New York - Nylon small Leslie

Marc by Marc Jacobs - Heartbeats bangle

Kenneth Jay Lane - Julius pearl bracelet

Reiss - Xena light gold stackable rings

Balenciaga - Butterfly frame sunglasses