A number of Windows Phone Central readers, who happen to be incredibly observant, have noticed a small change in Windows Phone 8. As one can see in the image above, the Windows Phone keyboard now shows the selected letters in the accent colours, as opposed to black or white.
Readers noticed a fresh look for the keyboard in a HTC 8X video tour, which shows off some features in Windows Phone 8 - something that was disallowed by Microsoft and OEMs in the past.
As one can see in the video below (at the 3:10 marker), characters selected on-screen will pop-up with an accent themed selection overlay. This is usually black for light themes and white for dark.
Thanks to everyone who informed us of this change!