The folks at 9to5Google spotted Google Image Search on mobile testing a related image design that takes on the color theme of the image result. So if the image is red, the related images below are in these red hue effect in the background.
Here is an image from 9to5Google (click to enlarge):
9to5Google calls this a "gorgeous redesign" of the image results.
Forum discussion at Twitter.
Update June 20, 2022: More examples and variations for you:
🧵 Another example for same
— Khushal Bherwani (@b4k_khushal) June 18, 2022
🆕Google test "Related Content" in image search results with coloursfull background Theme same as image.@rustybrick#images pic.twitter.com/lTuSiOcfAy
