I just wanted to share how I track the EMB (embroidery) threads.
Floriani Brand--- There is a flip-fold color chart available that has actual thread colors with the numbers. I put a small dot available from the office supply store next to each thread color that I own or add to the drawer.
The next option is to use the Floriani app on phone. You can add each thread to the owned list in the thread organizer, make shopping list, and use the color matcher function.
Exquisite--- Again, a flip-fold color chart is available. Add a sticky dot with the colors you own already. It is easy to take to the LQS when buying new colors.
Brother--- I haven't found the thread chart yet. I keep a list of colors in my phone with the Evernote app.
Here is a link to download free color charts if you like. (No affiliation with this company but I have ordered products from them).
http://sewingsupplywarehouse.com/freethreadpdf.html
Enjoy! Thread Storage is a post for another day.