this css selector is wrong
Screenshot 2024-07-08 at 11.13.25.png
https://laytheme.com/documentation/custom-css-styling.html
please read this and here u can learn how to find the correct selectors
i also wrote the selector for the site title in my last post
body[data-id="724"][data-type="page"] .sitetitle.txt span{
color: #ffffff;
}