Job: Add a background text that appears (chatbox)

Hello.

I want a background to the text that appears when you write something in the chatbox.

A background for the time, a background for the player's nick (with its color depending on his job), and another background for the text.

If it is possible I would like a little more space (10 pixels) between these three texts for more visibility.

I use the addon ClearChat.

Thank you.