Strut Your Stuff With a Custom Scrollbar | CSS-Tricks - CSS-Tricks

body::-webkit-scrollbar {
  /* required - the "base" of the bar - mostly for setting width */
}
 
body::-webkit-scrollbar-track {
  /* the "track" of the bar - great for customizing "background" colors */
}
 
body::-webkit-scrollbar-thumb {
  /* the actual draggable element, the star of the show! */
}