Microsoft Bing announced Twitter that they publish Bing themes on Bing search results pages. The company said “you can now customize your search experience with 7 colorful themes in Microsoft Bing’s web search.”
You should be able to use the themes in the upper right corner of the Bing menu bar:
Here are more screenshots:
We are happy to introduce Bing themes to our search pages! ✨
– Microsoft Bing Dev (@MSBing_Dev) June 4, 2021
Forum discussion Twitter.