In the MoonBot terminal I use Original icons, why are some of the cube icons next to folder names gray, pale blue, or bright blue?

: Interface configuration

If you have selected the original color icons in the MoonBot terminal (Settings – User Interface, Icons: Original), you can see the following cube icons next to folders:
– gray cube (no active strategies in the folder, all lights off)
– pale blue cube (you have some active strategies in the folder, all lights are on)
– bright blue cube (in the folder all strategies are active, all lights are on)