That's a good look, Brian, altogether successful in my viw.
Why? Frankly, if my younger brother came into town for lunch wearing his collars open, unbuttoned, and arranged over his sports jacket, I'd be happy with it and feel he was dressing with a bit of spritz.
After all, the "Romantic" look of poets and musicians is in resurgence today, and you've shown that the look can be achieved by just such a touch without going overboard. It's not right in all situations, but it seems right for you for the moment, and the call of when to go with it is strictly yours.
Just keep the fun in dressing, as you've done here in choosing a sports jacket that illuminates your complexion, and through your own explorations you'll discover most of the tricks of dressing well.
Wow. Everyone else thought the suit was a total failure
Thank you for the compliments!