Search Results in Blue

I've run a search in CA using the research folder option. When the results came back, I got six hits. Of the six, two are displayed with a blue font. I thought maybe this is because the items may have been reviewed earlier since the search parameters were set to include items already in review but that is not the case. I didn't see anything in the admin guide... Any idea what this would mean? (The image is blurred to protect the innocent.....)