What do different colored icons next to text messages mean?

[AC Question]

what do different colored icons next to text messages mean

There is a person icon next to each person's name on my phone that I have sent text messages to. some are green, some are blue and some are yellow. What do the colors mean? These are not icons that are a part of my text. these are icons to the upper left of the person's name on the phone.

 

[OceanView]

Re: what do different colored icons next to text messages mean

Which phone do you have and is this the included messaging app or did you download something else?