How to change the color of message text/background
Even though there is no option to edit chat window messages by default, you are able to customize them using Custom CSS. To do so, navigate to Configuration > Chat > Chat buttons > Edit your chat button. Then in the "Chat window" tab scroll down to the "Custom CSS" section and add the following CSS code:
/* In the below example, we are changing Avatar background, Messages background and Messages time color to BLACK. In order to change them to a different color, replace all blacks to a...