On the Look & Feel page you can alter the color of every element in the extension from button color to the color of the linked text. You may want to match the colors to those used in the business system where the extension will appear. Socialcast displays a preview of the extension so you can see exactly what it will look like on the page.
Remember to include the pound sign before every color code. If you’re not familiar with the codes, you can search for HTML color codes on the internet. Click Save & Continue when you finish.