#callus{ --call-us-form-header-background: #007bc7; //Primary Color --call-us-header-text-color: #ffffff; //Secondary Color --call-us-form-width: 300px; //Chat box panel & offline form vertical size in pixels --call-us-form-height: 500px; //Chat box panel & offline form horizontal size in pixels position: bottom left; bottom: 20px; right: 6px; }