In my work environment - professional, London-based, quite traditional - I would say that 95% of people wear black shoes with their suits. Not necessarily nice shoes, and we see a worrying number of slip-ons, but they are almost all black. Those who wear brown are typically not English.
I concede that black shoes will always be the most formal choice. When the occasion is black tie I will always reach for my matte calf, court shoes.
For important business meetings, dinners that require a lounge suit or interviews, my black captoes are my go to shoe.
For me though, these occasions are rare. I am lucky in that I can dress in the style of WAYWRN at work without it being a problem.
The CEO dresses in cardigans and chinos with a ubiquitous pair of suede loafers, much in the style of a Loro Piana display.
I ask you, as a man who notices the colour of people's shoes, are you more likely to approve of a person wearing square toed black shoes or a pair of dark brown, almond shaped captoes from a reputable Northampton maker? Is a person wearing black duck bills ever going to call somebody out for wearing a pair of dark oak EGs?
Furthermore, your CBD dress is required every day (I presume). For me there is a slight thrill, in dressing in black, to me it is different.
Are you not bored of wearing black shoes to work?