scrollbars/scrollbar-buttons.html

<head>
<style>
div::-webkit-scrollbar {
  width:17px;
  height:17px;
}

div::-webkit-scrollbar-button {
  display: block;
  width: 17px;
  height: 17px;
}

div::-webkit-scrollbar-button:decrement:start {
  background-color:lightblue;
  border:2px solid black;
}

div::-webkit-scrollbar-button:increment:start {
  background-color:lightgreen;
  border:2px solid black;
}

div::-webkit-scrollbar-button:decrement:end {
  background-color:orange;
  border:2px solid black;
}

div::-webkit-scrollbar-button:increment:end {
  background-color:brown;
  border:2px solid black;
}

div::-webkit-scrollbar-thumb {
  min-width:20px;
  min-height:20px;
  background-color: navy;
  border:2px solid #cccccc;
}

div::-webkit-scrollbar-track-piece:decrement {
  background-color: olive;
}

div::-webkit-scrollbar-track-piece:increment {
  background-color: pink;
}
</style>
</head>
<body>
<div style="width:200px; height:200px; overflow-y:scroll; overflow-x:hidden">
Hello<br>
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<span style="white-space:nowrap">Hello world this is a long string and will not wrap.</span>
Hello<br>Hello<br>Hello<br>Hello<br>
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Hello<br>Hello<br>Hello<br>Hello<br>
Hello<br>Hello<br>Hello<br>Hello<br>Hello<br>Hello<br>
Hello<br>Hello<br>Hello<br>Hello<br>
Hello<br>Hello<br>Hello<br>
</div>