Microsoft has added a new theme pack to the Microsoft Store for Windows 10 users. Titled Mountain Light PREMIUM theme pack, the new theme pack contains 18 high-quality 4K wallpapers, the description of which reads as follows:
Take in these sweeping views of 18 spectacular mountains around the world. These 4k premium images are free for Windows 10 Themes, and to be used as desktop wallpaper only.Gallery
After downloading the collection, go to Start > Settings > Personalization > Themes and click on the theme you prefer.
To apply and change to the most appropriate color, based on the current wallpaper, go to Customize > Colors > Automatically select a primary color from the background.
Find the new Mountain Light PREMIUM in the Microsoft Store here.