Absolutely beautiful! Purple and yellow out in nature is a combination that I just love to see. The background shows even more, your DOF makes them perfectly soft. Very nice.
I see the shadow, so it was clearly a very bright day. I like that the light hits those flowers and makes them pop out so vividly. Nothing looks washed out, there are no hot spots, so frankly the brightness isn't bothering me a bit. It's a sunny day. You could drag down the brightness, I suppose, but you don't want to risk losing that gorgeous color.