Hello Ciao,
Thank you for the liking our plugin “TWB Woocommerce Reviews”.
Did you take a look at the plugin options page in the backend? You can easily customize the background and text color from there. You can find that under Settings > TWB Woocommerce Reviews.
Here is a screenshot for your help. https://www.screencast.com/t/JboYaK0fVP
let me know if still any issue/question?
Regards,
Abu