What does the blue icon mean in hangouts?

[AC Question]

A contact has recently gone from faded green/dark green to light blue/dark blue. What does that mean?

 

[Golfdriver97]

Welcome to the forums. Is that contact an SMS contact?

 

[Amy Balbi]

I’d like to know the same. I have a few people from my contacts that have green circle with white avatar next to their name and then some that have light blue circle with dark blue avatar. And I’ve seen the colors change back and forth also. What does it signify? Some contacts have their photo so there is no green or blue avatar. Help lol.