After playing alot more, I am quite certain of all the colors!
Red = doctor, yellow = stranger, green = mc, white = someone you know, blue = someone close like family, pink is lover?
I do not think Ryan is the mc's name too. I only found 2 names; Ryan and Sam. When Sam's dialogue came up, I got an achievement of Three Amigos but weirdly enough it only shows 2 people on the mainscreen. I dont understand that yet.
Did you get anything new?