Toggle

Implemented as radio group
Name legend and labels
Animate your SVG with CSS when changing the selection

<fieldset class="toggle" role="radiogroup">
  <!-- Descriptive name for the option to toggle -->
  <legend class="toggle__legend">Toggle option X</legend>
  <div>
    <label for="toggle-off" class="toggle__label">Off</label>
    <span class="toggle__wrapper">
      <input type="radio" name="toggle-option-x" id="toggle-off" checked />
      <input type="radio" name="toggle-option-x" id="toggle-on" class="toggle__selector" />
      <svg
        xmlns="http://www.w3.org/2000/svg"
        viewBox="0 0 150 100"
        width="1.5em"
        height="1em"
        version="1.1"
        class="toggle__icon"
      >
        <g class="track" fill="#000">
          <rect x="25%" y="20%" width="50%" height="60%" />
          <circle cx="25%" cy="50%" r="23.5%" />
          <circle cx="75%" cy="50%" r="23.5%" />
        </g>
        <circle class="knob" cx="30%" cy="50%" r="30%" fill="#ff69b4" stroke="#ff69b4" stroke-width="4" />
      </svg>
    </span>
    <label for="toggle-on" class="toggle__label">On</label>
  </div>
</fieldset>

.toggle {
  margin: 0;
  padding: 0;
  border: none;
}
.toggle__legend {
  margin-bottom: .5em;
}
.toggle__label {
  cursor: pointer;
}
.toggle [type='radio'] {
  display: inline-block;
  box-sizing: border-box;
  padding: 0;
  margin: 0 -2px 0 0;
  position: relative;
  width: 50%;
  height: 100%;
  opacity: 0;
  z-index: 1;
  cursor: pointer;
}
.toggle__wrapper {
  display: inline-block;
  position: relative;
  vertical-align: middle;
  /* Toggle size */
  width: 4em;
  height: 2em;
  border-radius: 1.5em;
}
.toggle__icon {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  transition: all 0.1s ease-out;
}
/* SVG styles */
.toggle__icon .track {
  fill: #eee;
}
.toggle__icon .knob {
  fill: hotpink;
  stroke: hotpink;
}
/* Toggle ON SVG styles */
.toggle__selector:checked ~ .toggle__icon .track {
  fill: #333;
}
.toggle__selector:checked ~ .toggle__icon .knob {
  transform: translateX(50%);
}
/* Toggle Focus SVG styles */
.toggle [type='radio']:focus ~ .toggle__icon {
  filter: drop-shadow( 0 0 6px orangered);
}
.toggle [type='radio']:focus ~ .toggle__icon .knob {
  stroke: orangered;
}