It's not that light; more of a postman's blue. Lighter than navy to be sure, but darker and more muted than avion blue. The stripes are bold, but they're still stripes. A double windowpane is inherently bolder than any stripe.
"Inherently"? Like the casualness of a DB patch pocketed suit? Get Real will ya? That is what "YOU think Not other people. Wear it infront of good ol' natured conservative minded people and they will let you know otherwise.
Too warm to wear. The weather has turned. It's hibernating until fall.
Remember, part of the "charm" in being offensive is utter & complete disregard of climatic conditions around you. Such as wearing heavy tweed artciles when people are wearing just shirt & ties or wearing 3-pc linen suits when rest of the public is in flip-flops and shorts.