Hi,

Qbittorrent uses colors to help identify the types of torrent status. Light black is used for seeding, light green for checking already existing data,light blue for force resuming a file and symbolized as [F] and finally normal green for Queued torrents.I can gather all these status in one file,
https://imgur.com/umyChwi

So that you can check, Also you need to know that these types of colors located in most of torrent clients so you are in need to be familiar with.

Thanks