Saturation Slider

<div class="nuda-satslide">
  <div class="nuda-satslide__row">
    <span>Sat</span>
    <div class="nuda-satslide__track"
         style="background: linear-gradient(90deg,#63636e,#62b6ff)">
      <span class="nuda-satslide__thumb" style="left:75%"></span>
    </div>
    <span class="nuda-satslide__val">75</span>
  </div>
  <!-- Lightness row -->
</div>

.nuda-satslide {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px;
  background: rgba(255,255,255,.02);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 10px;
  width: 100%;
  max-width: 240px;
}

.nuda-satslide__row {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #a0a0a8;
  font-size: 10px;
  font-family: ui-monospace,SFMono-Regular,Menlo,monospace;
}

.nuda-satslide__row > span:first-child {
  width: 18px;
  color: #63636e;
}

.nuda-satslide__track {
  position: relative;
  flex: 1;
  height: 6px;
  border-radius: 99px;
  cursor: pointer;
}

.nuda-satslide__thumb {
  position: absolute;
  top: 50%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #fafafa;
  border: 2px solid #0c0c10;
  transform: translate(-50%,-50%);
  box-shadow: 0 0 0 1px rgba(255,255,255,.4);
  transition: transform .25s,left .35s cubic-bezier(.16,1,.3,1);
}

.nuda-satslide__thumb:hover {
  transform: translate(-50%,-50%) scale(1.18);
}

.nuda-satslide__val {
  width: 24px;
  text-align: right;
  color: #fafafa;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}