Most of my suits are blue, grey, somewhere in between, solid or pinstripe, and usually three piece. I pretty much never wear loafers for work, occasionally a simple monk, usually dark formal lace-ups. So the basics are always pretty conservative really. As for being appropriate, well I run my own businesses so I guess I'm only accountable to myself and my partners. There's also the aspect of customers of course, some of whom are senior military or security people. But in this environment, I enjoy playing the novelty English eccentric role from time to time, to offset the spikier side of my persona and the sometimes serious nature of business. Adding a bit of dandy-esque novelty seems to be something that works in the bigger package - I'm the novelty Arabic-speaking well-dressed foreigner anyway, so camping it up just a tiny bit seems to be something to which my clients respond.