Chat - Transparent
Selecting this option will choose the transparent chat window as shown below:
Note: When the transparent option is selected, a darker background will appear beneath the chat window when the mouse is moved over it as shown below:
Note: Most of the fonts used in this UI are clear type fonts with shading around the edges to make them appear smoother. In some cases, certain font color and background combinations are not rendered well in the game particulary when on a transparent background. A limited set of "non" clear type chat font options tagged as "transparent fonts" are available for use on transparent backgrounds if you desire.
You can also try one of the new True Type font styles to see if they have the contrast needed to suite your taste.