Directly from the docs I linked you. If you want to keep the little speech bubble icon but change the colors from black & white to something else: 1. Download the chat icon or take a screenshot of it 2. Use an image editor like pain, photoshop, or https://www.photopea.com/ 3. Save the modified image and host it somewhere (you can even host it on Google drive) 4. Add the URL to your new, modfied image to you bot's CSS