Different work environments are just that...different, so they may or may not have wardrobe standards that are appropriate for people in one department but not another. The old rule of thumb is, "dress for the job you want, not the job you have." But this is not always practical. For example, if you work in a warehouse but want a management job, I wouldn't necessarily wear suits to work if you're packing boxes and running a forklift!
I have tried to be consistently among the best-dressed people working within my department, and always more formally dressed than the co-workers I have to supervise. "Best dressed" does not mean the most fashionable, mind you, or even wearing the most expensive clothes. Rather, being well dressed means that you pay attention to ALL the details ALL the time: grooming, outfit/accessory combining, shined shoes in good repair, hair and makeup in place, etc. Do NOT allow yourself to have "off-days" in terms of grooming and presentation...it sends all sorts of messages that you may not intend to send, but others may perceive and act upon anyway..and never in your favor!
I struggled with this issue for a long time, but I realized that paying attention to clothes and grooming for work simply sends the message that you care enough about yourself to want to show and be your best at your job. I also realized how easily people are manipulated by visual images, and that many NT's do indeed "think with their eyes," so I wanted to take advantage of that. But after all that, it's still down to being a person of exemplary character, kindness, and integrity. People remember more of how you treat them than of how you look, but looking better will open more doors for you to show others what a great person you are!