One of my players has a rare form of color blindness (as I understand it). Shades of Green appear as white or grey. As such he finds it difficult to see inline dice roll criticals with the green border. My suggestion would be to have a setting under the Settings tab, or the Roll20 Profile, that would allow for the change a majority of color options within Roll20, at the very least for inline dice rolls and the mouse over information in the chat window. Or, perhaps an option for the GM to make a global change for their campaign. Of course this could probably be rectified with the use of an API, however I am not even remotely adept and creating an API and most of the custom APIs I find online don't provide instructions for use. Thanks for your consideration.