How to switch on the light theme on Xbox One

[Windows Central]

Light theme is here for Xbox One, and it looks pretty slick!
If you're a fan of light themes on Windows 10, I have some good news for you, a light theme is on the way for Xbox One too!
Currently available only on the Xbox Alpha ring, the light theme offers a far brighter take on the Xbox UI, adding a white background to menus, guides, and beyond. It's easy to activate, and we're going to tell you how to do it.

Full story from the WindowsCentral blog...