User blog comment:Rappy 4187/Technical Update: January 18, 2016/@comment-2763-20160118235333/@comment-126761-20160121114301

Ah, it's blue as that's how Shared Help works.

I don't believe a help page is needed for Pinterest, since it simply improves how Wikia pages are listed when shared on that site. (This change is not about using Pinterest on Wikia.)