Microsoft has added a new theme pack to the Microsoft Store for Windows 10 users. Titled Leafy Structures, the new theme pack contains 14 high-quality wallpapers, the description of which reads as follows:
Zoom in on the branching veins of colorful leaves in these 14 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.