Black cap-toe - although you may not need it for work, it is still a must
Chukka - this should be your tan suede option, you can wear on very casual work days too
Derby (bluchers) - the most suited shoe for your work environment; however, medium or dark brown would have be better
Penny loafers - good casual shoe, you can wear to work as well if you like & again like the derby, medium or dark shade would be better
Boots - personal choice
Personally, I would...