A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
I ran across this same exact issue with excel... and figured out how to fix it! Just remove your filter completely and then add it back and the blue row numbers go back to their default non-filtered color. :) Hope that works for you. It did for me.
By the way, I'm posting this five years after the original post. The internet continually amazes me.