Bing is continuously putting their effort in making its platform better, here is one more step towards it. The bing search results color gets changed in gray when you put your cursor over the next page no. of pagination section appears below in the footer.
Frank Sandtmann, A German SEO Consultant noticed this & shared it over twitter.
Here is a GIF shared by Barry Schwartz:
It is interesting to see such changes, however these changes are not visible for me in India.