grafana/public/sass/components/_scrollbar.scss

/*
 * Container style
 */
.ps {
  overflow: hidden !important;
  overflow-anchor: none;
  -ms-overflow-style: none;
  touch-action: auto;
  -ms-touch-action: auto;
}

/*
 * Scrollbar rail styles
 */
.ps__rail-x {
  display: none;
  opacity: 0;
  transition: background-color .2s linear, opacity .2s linear;
  -webkit-transition: background-color .2s linear, opacity .2s linear;
  height: 15px;
  /* there must be 'bottom' or 'top' for ps__rail-x */
  bottom: 0px;
  /* please don't change 'position' */
  position: absolute;
}

.ps__rail-y {
  display: none;
  opacity: 0;
  transition: background-color .2s linear, opacity .2s linear;
  -webkit-transition: background-color .2s linear, opacity .2s linear;
  width: 15px;
  /* there must be 'right' or 'left' for ps__rail-y */
  right: 0;
  /* please don't change 'position' */
  position: absolute;
}

.ps--active-x > .ps__rail-x,
.ps--active-y > .ps__rail-y {
  display: block;
  background-color: transparent;
}

.ps--focus > .ps__rail-x,
.ps--focus > .ps__rail-y,
.ps--scrolling-x > .ps__rail-x,
.ps--scrolling-y > .ps__rail-y {
  opacity: 0.6;
}

.ps__rail-x:hover,
.ps__rail-y:hover,
.ps__rail-x:focus,
.ps__rail-y:focus {
  background-color: transparent;
  opacity: 0.9;
}

/*
 * Scrollbar thumb styles
 */
.ps__thumb-x {
  background-color: #aaa;
  border-radius: 6px;
  height: 6px;
  /* there must be 'bottom' for ps__thumb-x */
  bottom: 2px;
  /* please don't change 'position' */
  position: absolute;
}

.ps__thumb-y {
  @include gradient-vertical($blue, lighten($blue, 20%));
  border-radius: 6px;
  width: 6px;
  /* there must be 'right' for ps__thumb-y */
  right: 2px;
  /* please don't change 'position' */
  position: absolute;
}


/* MS supports */
@supports (-ms-overflow-style: none) {
  .ps {
    overflow: auto !important;
  }
}

@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
  .ps {
    overflow: auto !important;
  }
}

.ps__rail-x:hover,
.ps__rail-y:hover,
.ps__rail-x:focus,
.ps__rail-y:focus {
  background-color: transparent;
  opacity: 0.9;
}

// Srollbars
//

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar:hover {
  height: 8px;
}

::-webkit-scrollbar-button:start:decrement,
::-webkit-scrollbar-button:end:increment { display: none;  }
::-webkit-scrollbar-button:horizontal:decrement {  display: none; }
::-webkit-scrollbar-button:horizontal:increment {  display: none; }
::-webkit-scrollbar-button:vertical:decrement { display: none; }
::-webkit-scrollbar-button:vertical:increment { display: none; }
::-webkit-scrollbar-button:horizontal:decrement:active { background-image: none; }
::-webkit-scrollbar-button:horizontal:increment:active { background-image: none; }
::-webkit-scrollbar-button:vertical:decrement:active { background-image: none; }
::-webkit-scrollbar-button:vertical:increment:active {background-image: none; }
::-webkit-scrollbar-track-piece { background-color: transparent; }

::-webkit-scrollbar-thumb:vertical {
  height: 50px;
  background: -webkit-gradient(linear, left top, right top, color-stop(0%, $scrollbarBackground), color-stop(100%, $scrollbarBackground2));
  border: 1px solid $scrollbarBorder;
  border-top: 1px solid $scrollbarBorder;
  border-left: 1px solid $scrollbarBorder;
}

::-webkit-scrollbar-thumb:horizontal {
  width: 50px;
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, $scrollbarBackground), color-stop(100%, $scrollbarBackground2));
  border: 1px solid $scrollbarBorder;
  border-top: 1px solid $scrollbarBorder;
  border-left: 1px solid $scrollbarBorder;
}