There are multiple different skins in the chat room. What is invisible to you, may not be invisible to me
Example: On the white Skin, you cannot see Bright Yellow, or White text. I, however, am using the Dark skin, and I can see the colors perfectly
My point: We have no valid reason to dictate the color of the fonts that people choose. Change your skin if you can't see thier font color, or jsut keep highlighting, this is pointless