Identifying new messages in In-box

[The Quadfather]

This should be obvious you would think?
My inbox shows that I have 3 new messages. I can see no difference in the messages in terms of being highlighted or anything. How can I go back and identify which of these messages are still unread.
Some are one color and some are another...( I am red/green color blind, which basicly means that I don't like to identify any colors by name, but I can certainly see within this folder all the emails are either one color or another)

[Amx]

I'm thinking all the new messages are at the top, and the older messages are below any new messages.

Send me a PM and I'll see if there is a color difference.

Also any new message that is unread should have a little box to click on to the left of the message. Once you click on that box to open the PM then that box disapears. If you click on the message title to open the message again, then the title changes to orange, otherwise it's blue.