Microsoft has released 4 new free wallpaper theme packs into the Microsoft Store. There does not appear to be any unifying theme except the celebration of beauty around the world. The collections include:
Same… but different? Opposites attract in these 15 images, free for Windows 10 Themes.
Find Opposite Day in the Microsoft Store here.
From scarlet to crimson to ruby red, these 15 images of cars, cranberries, cardinals, and more are free for Windows 10 Themes.
Find Seeing Red in the Microsoft Store here.
Knits and Wool
From shelves full of skeins to cozy cables, the beauty of wool shines in these 16 images, free for Windows 10 Themes.
Find Knits and Wool in the Microsoft Store here.
Celebrate the delicate beauty of butterflies as they flit, feed, and hatch in this 20-image wallpaper set, free for Windows 10 Themes.
Find The Butterfly in the Microsoft Store here.
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 colour, based on the current wallpaper, go to Customize > Colors > Automatically select a primary colour from the background.