Looks like Google Is Testing Different Colors for Their Drop Down Buttons on Mobile SERPs

Looks like Google might be testing different colours for the drop-down button in mobile SERPs for animal-related queries, I tried a bunch of other searches and this was not appearing but for animal queries like the ones listed below, those were appearing in different colours.

Sample Query: Try searching for how long do bears live, how long do tigers live, how long do lions live on Mobile. I can replicate this on iPhone from Australia.