message: Updated: alpha slider style.
diff: background: linear-gradient(to right, hsl(0, 100%, 50%) 0%, hsl(30, 100%, 50%) 8.333%, hsl(60, 100%, 50%) 16.666%, hsl(90, 100%, 50%) 25%, hsl(120, 100%, 50%) 33.333%, hsl(150, 100%, 50%) 41.666%, hsl(180, 100%, 50%) 50%, hsl(210, 100%, 50%) 58.333%, hsl(240, 100%, 50%) 66.666%, hsl(270, 100%, 50%) 75%, hsl(300, 100%, 50%) 83.333%, hsl(330, 100%, 50%) 91.666%, hsl(360, 100%, 50%) 100%);
  }
  +.Colorpicker__alphaSlider > .Slider .Slider__rail {
  + background: linear-gradient(to right, rgba(0,0,0,0) 0%,rgba(0,0,0,1) 100%);
  +}
  +
  .Colorpicker__alphaSlider > .Slider .Slider__track,
  .Colorpicker__hueSlider > .Slider .Slider__track {
  background-color: transparent;
  border-radius: 3px;
  }
  -.Colorpicker__colorChangeButton--hover {
  +.Colorpicker__colorChangeButton.hover {
  background-color: var(--color-bg-tertiaryLight);
  }
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