Microsoft has added a new theme pack to the Microsoft Store for Windows 10 users. Titled Chilly Morning, the new theme pack contains 15 high-quality wallpapers, the description of which reads as follows:
Take in the frosty, light-filled views of early winter mornings while keeping warm at your desk in these 15 images, free for Windows 10 Themes. These images are to be used as desktop wallpaper only.
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.