Vinyl windows can be kind of tricky when it comes to trim colors – they are almost always stark white and generally cannot be painted (see below). Some lean to matching trim color to the vinyl – this gives a hospital-feeling white-on-white look that lacks visual interest. It also ranks a solid “Zero” on the Warmth scale.
The other end of the spectrum is the high contrast approach. This lacks subtlety and, just like whitewall tires, isn’t suited for most homes. Both white-on-white and dark-on-white are just too harsh a contrast for most tastes.