<label for="stoggle" class="wtoggle skew">
  <input class="wtoggle__input" type="checkbox" id="stoggle">
  <div class="wtoggle__fill"></div>
</label>

.wtoggle.skew {
  --width: 70px;
  --height: calc(var(--width) / 2);
  display: inline-block;
  cursor: pointer;
  transform: skew(-10deg);
}

.wtoggle__input {
  display: none;
}

.wtoggle__fill {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: bold;
  font-family: sans-serif;
  position: relative;
  width: var(--width);
  height: var(--height);
  color: #FFFFFF;
  background: #888888;
  transition: all 0.5s ease;
}
.wtoggle__input:checked ~ .wtoggle__fill {
  background: #2271B1;
  overflow: hidden;
}
.wtoggle__fill::before {
  content: "OFF";  
  transition: all 0.2s ease;
  width: 100%;
  text-align: center;
  position: absolute;
  line-height: 2em;
  font-weight: bold;
  color: #fff;
}
.wtoggle__fill::after {
  content: "ON";  
  transition: all 0.2s ease;
  width: 100%;
  text-align: center;
  position: absolute;
  line-height: 2em;
  font-weight: bold;
  color: #fff;
  transform: translate(100%);
}
.wtoggle__input:checked ~ .wtoggle__fill::after {
  transform: translate(0%);
}
.wtoggle__input:checked ~ .wtoggle__fill::before {
  transform: translate(-100%);
}