idiggory the Fussy wrote:
As long as you aren't wearing tuxedo shoes, you're really fine. Oxfords are the most formal, but they're also the most basic. So as long as your wearing nice, dark-wash jeans, it works fine (just be sure you aren't wearing black socks).
I'll agree brown are nicer with jeans, though. But black are fine.
Though, the shinier the leather, the less they'll work with jeans.
Oxfords are fairly formal, more so than open laced shoes so they're less likely to go with jeans. Black is more formal than brown which in turn is more formal than other colours/gets less formal the lighter it gets and more broguing = less formal so something like the ones I linked above will work with jeans but a pair
like this really won't despite both being oxfords.
All that said, I'm not a fan of the black/blue combination to start with and brown/blue is almost always more pleasing to the eye. Black just doesn't work that well with many colours or situations.