Why are some play times glowing green?

If you add friends on the switch, you can see their playtimes for the games that they have. I have noticed that some of the playtimes show up as green rather than grey. It is not because I own the game. Does anyone know why this happens?


Solution 1:

The numbers appear to go from grey to green if someone has played that game for 50+ hours.

From this thread:

If you've played more than 50 hours, it turns green.