It's nothing personal just my taste of casual clothing. White pants, white wide sneakers, not fine in my eyes. And the belt is so wide with a huge buckle (neither my taste) the shirt is OK. Maybe a pair of normal jeans or beige chinos and loafers would be better.
Jmen made a perfect casual outfit, if you look at his pictures.
Friends, have a nice saturday :)!
+1 personally think that its a bit of a faux pas doing the whole white with almost white. I think if you had of worn darker shoes (perhaps matching your belt color?) this look would have come together better. It may just be my personal taste but I also think that this outfit on your build would look better with a thinner belt.