CSS

custom scrollbar

body::-webkit-scrollbar {
  width: 12px;               /* width of the entire scrollbar */
}
body::-webkit-scrollbar-track {
  background: orange;        /* color of the tracking area */
}
body::-webkit-scrollbar-thumb {
  background-color: blue;    /* color of the scroll thumb */
  border-radius: 20px;       /* roundness of the scroll thumb */
  border: 3px solid orange;  /* creates padding around scroll thumb */
}

style scrollbar

/* Chrome, safari */
*::-webkit-scrollbar {
	width: 8px;
}

*::-webkit-scrollbar-thumb {
	background-color: gray;
}

/* Firefox */
.selector {
		scrollbar-width: none;
	}

custom scrollbar

  body::-webkit-scrollbar {
    width: 12px;
}
body::-webkit-scrollbar-thumb {
    background: #ff9c44;
    border-radius: 6px;
}

by moheen

scrollbar style

::-webkit-scrollbar addresses the background of the bar itself. It is usually covered by the other elements
::-webkit-scrollbar-button addresses the directional buttons on the scrollbar
::-webkit-scrollbar-track addresses the empty space “below” the progress bar
::-webkit-scrollbar-track-piece is the top-most layer of the the progress bar not covered by the draggable scrolling element (thumb)
::-webkit-scrollbar-thumb addresses the draggable scrolling element that resizes depending on the size of the scrollable element
::-webkit-scrollbar-corner addresses the (usually) bottom corner of the scrollable element, where two scrollbars might meet
::-webkit-resizer addresses the draggable resizing handle that appears above the scrollbar-corner at the bottom corner of some elements