Is there a guide to the color coded dots next to apps and filenames?

Hi. Prior to my current MBP (retina 2015) purchased 9 months ago, I had an iMac desktop from 08. So, I'm slowly become familiar with the Mac world, again. El Capitan to Catalina is a huge jump!

I see blue/green dots next to my app/file names. I learned the blue dot next to the app means the app was recently updated but not launched since the update... What does the blue dot next to the filename on my desktop mean? It's next to a Reason 11 file I created and have opened, but the blue dot is still there. Is there a guide to what these mean? are there more than just blue and green? Thank you.