Avast amber and blue "globe" in taskbar

Occasionally, it will change from amber to blue…then stay amber, then, occasionally, it will rotate from color-to-color.

Can you tell me please what is occurring while this is going on, please?

Many thanks for taking the time to respond!

Alain

In short, Avast is scanning - nothing to worry.

The use of Blue is to simulate the rotation effect of the tray icon, to indicate it is scanning.