In my personal experience, being well dressed for the office has proven to be as tricky as figuring out what meal your girlfriend wants you to bring her. A lot of fields, such as banking, are very conservative and old school, therefore mere Happy Socks might be seen as over accessorising.
The key to being well dressed for the workplace is subtlety; this, of course, depends on which field you’re in and whether it allows for a bit more creativity. It’s the subtle details of your outfit that will set you apart from your colleagues. They might not know what it is exactly, but they’ll see that you’re in a league of your own.