You can adjust the following styles. Remove any line to revert it back it’s default value.
/**
* Collection Carousel
* Excerpt Styles
* From Will-Myers.com
**/
[data-wm-plugin="collection-carousel"] {
--wm-cc-excerpt-font-size: 1rem;
--wm-cc-excerpt-color: red;
--wm-cc-excerpt-text-align: center;
}