Here's today's fit:
It is with a long sleeve rolled up. Slightly more SF approved, but this doesn't mean I won't wear the short sleeve. I think rolling up a long sleeve is a very purposefully casual look that makes one look incredibly laid back. If I'm out and about doing stuff, I feel that - for me - a short sleeve keeps the silhouette very sharp, and keeps me feeling a lot more active.
Also, as someone said, the loafers and jeans are in the shadow. there's a lot more contrast in sunlight.
PS Socks are navy, look a little black here!