Typically, when Google highlights phrases in a featured snippet or AI Overview within Google Search, the highlighter color is blue. We've seen Google test other colors before, but here is a new one - a pink highlight.
Here is a screenshot from Sachin Patel who posted about this on X and SEW:
I tried to replicate this, and I was not successful.
I am not sure if I care if it is blue, pink, brown, yellow or some other color - do you?
Forum discussion at X.
