Only in the upper class Italian style of dress which you (and to a lesser extent I) prefer. In certain other traditions, including certain circles in England, the shirt is the centerpiece. I used to dress more that way myself, not so much anymore, though today I have on a rather busy red check shirt.
The idea was that a true "gentleman" only wore his school/club/regimental ties, or else solids, and also only wore blue and gray city suits, so the only leeway he had for fun was shirts. This is why Jermyn street is so much more "vibrant" than what you see in shirtmakers in Italy, where the question is basically, "Which shade of light blue would you like, signor?"
Re-posting on grounds of accuracy, importance, and insight.
The same principle applies (at least here) to busy or colourful pocket squares on an otherwise ultra-CBD get-up.