Whenever I scroll through 'newest questions' some of the questions highlighted in blue, for example:
Why is this?
5
1 Answer
That's how it shows up when you have a tag that you marked as one of your favorite tags. In your screenshot, that question has the tag that I see in your favorite tags list, on the right.
From the What do "favorite tags" and "ignored tags" do?:
Questions with these tags become highlighted on the front page.
answered Apr 1, 2017 at 18:18
Also, let me know you that it isn't because I haven't clicked that link in my browser.mean?