In order versions of Internet Explorer it allows you to customize the scroll bars and Chrome allows you to do the same. Firefox doesn’t have this option yet.
My wish is that there was a standard property for all the browsers because scrollbars are apart of web design and we should have control over it.
::-webkit-scrollbar { width: 14px; }
/* Track & scroll thickness */
::-webkit-scrollbar-track { background-color:#ddd; }
/* Track color */
::-webkit-scrollbar-thumb { background-color: #333;}
/* Scroll color */
::-webkit-scrollbar-thumb:hover { background-color: #000 }
/* Scroll hover color */
::-webkit-scrollbar-thumb:active { background-color: #000 }
/* Scroll click & drag color */