a navy blue suit的用法和样例：
- No. I'm looking for a navy blue raincoat, size 36.
- He sat in the chapel next to his father's body, which had been dresses in a handsome, new, navy blue suit and lay out in a dark blue metal casket.
- Her white hair elegantly coifed and wearing a smart navy blue suit, she raised a glass of sparkling wine in a toast to her long life.
- The professor's new girlfriend presents him with a gift: a navy blue parka.