Google is once again testing gray colored stars in the search results, where you would typically see orange stars for the rich results review snippets. Google did a lot of testing on the colors of the stars in 2014 including green, yellow, gray, red and orange and others. Here Google is back testing, but a gray color.
John Leo Weber shared a screen shot of it on Twitter and said he didn’t like it:
This is what I see:
Forum discussion at Twitter.