Purple ties mostly, but sometimes they are combined with a shirt and a jacket in a different shade of purple.
I've seen it primarily on newscasters, but also on sports figures and politicians. Sometimes quite garish.
Footnote: My friend Cedric Chang says "OK I actually have the real reason why you are seeeing an abundance of purple on tv....with the invention of HD (high def) the camera and the television are actually able to give you a correct shade of purple whereas before shooting purple always read a weird shade of blue. Unfortunately this still occurs in still photography in RGB." Thanks, Cedric!