Custom Scrollbar in CSS

scroll.css

body::-webkit-scrollbar {
  width: 12px;               /* width of the entire scrollbar */
}
body::-webkit-scrollbar-track {
  background: linear-gradient(rgb(10, 10, 10),rgb(7, 7, 3),rgb(5, 10, 4));        /* color of the tracking area */
}
body::-webkit-scrollbar-thumb {
  background-color: rgb(225, 248, 143);    /* color of the scroll thumb */
  border-radius: 20px;       /* roundness of the scroll thumb */
  border: 3px solid rgb(71, 70, 66);