What the colors mean: A post you have read. A post you haven't read.
So look for the yellow icons to see what's new.
Also, either color icon can have a symbol inside: An important topic or announcement. A closed topic that you can only read, like this one. A topic that contains a poll.
A post you have read.
A post you haven't read.
An important topic or announcement.
A closed topic that you can only read, like this one.
A topic that contains a poll.
