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HTML 

              
                <h1>Switches</h1>

<div class="themes">

  <p>Theme:</p>

  <label class="theme__color">
    <input type="radio" name="color" class="theme__input" value="green" checked>
    <span class="theme__icon" style="--color: hsl(160, 79%, 46%)"></span>
  </label>

  <label class="theme__color">
    <input type="radio" name="color" class="theme__input" value="blue">
    <span class="theme__icon" style="--color: hsl(200, 79%, 46%)"></span>
  </label>

</div>

<section class="switches" data-theme="green">

  <div class="switch switch--1">
    <label class="switch__label">
      <input type="checkbox" class="switch__input">
      <span class="switch__design"></span>
    </label>
  </div>

  <div class="switch switch--2">
    <label class="switch__label">
      <input type="checkbox" class="switch__input">
      <span class="switch__design"></span>
    </label>
  </div>

  <div class="switch switch--3">
    <label class="switch__label">
      <input type="checkbox" class="switch__input">
      <span class="switch__design"></span>
    </label>
  </div>

  <div class="switch switch--4">
    <label class="switch__label">
      <input type="checkbox" class="switch__input">
      <span class="switch__design"></span>
    </label>
  </div>

  <div class="switch switch--5">
    <label class="switch__label">
      <input type="checkbox" class="switch__input">
      <span class="switch__design"></span>
    </label>
  </div>

  <div class="switch switch--6">
    <label class="switch__label">
      <input type="checkbox" class="switch__input">
      <span class="switch__design"></span>
    </label>
  </div>

  <div class="switch switch--7">
    <label class="switch__label">
      <input type="checkbox" class="switch__input">
      <span class="switch__design"></span>
    </label>
  </div>

</section>

<a href="https://abubakersaeed.netlify.app/designs/d6-switches" class="abs-site-link" rel="nofollow noreferrer" target="_blank">abs/designs/d6-switches</a>
!

CSS 

              
                // default
// ==========================================================
*,
*::after,
*::before {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 62.5%;
}

body {

  & {
    --color: hsl(220, 50%, 90%);
    --global-background: hsl(220, 25%, 10%);
  }

  & {
    min-height: 100vh;
    padding: 2rem;

    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;

    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    color: var(--color);
    background: var(--global-background);
  }

}

h1 {
  font-size: 3.2rem;
  font-weight: normal;
  letter-spacing: .4rem;
}

p {
  font-size: 1.6rem;
}

// themes & switches
// ==========================================================
.theme {

  &s {
    display: flex;
    align-items: center;

    position: absolute;
    top: 6rem;
    right: 6rem;

    padding: .4rem 2rem .4rem 3rem;
    border: 1px solid hsla(0, 0%, 100%, .2);
    border-radius: .8rem;
  }

  &__color {

    & {
      margin: 1rem;

      cursor: pointer;
      position: relative;
    }

    &:first-of-type {
      margin-left: 2rem;
    }

  }

  &__input {
    opacity: 0;
    position: absolute;
    left: 50%;
    top: 50%;
    z-index: -1;
  }

  &__input:checked+&__icon {
    box-shadow: 0 0 0 .5rem var(--global-background), 0 0 0 .6rem hsla(0, 0%, 100%, .2);
    transform: scale(1);
  }

  &__input:focus+&__icon {
    box-shadow: 0 0 0 .5rem var(--global-background), 0 0 0 .6rem var(--color);
  }

  &__icon {
    display: inline-block;

    width: 2.6rem;
    height: 2.6rem;
    border-radius: 100rem;

    background: var(--color);

    transform: scale(.6);
    transition: .2s;
  }

}

.switches {

  &[data-theme="green"] {
    --primary-light: hsl(160, 79%, 46%);
    --primary-dark: hsl(160, 79%, 16%);
    --ripple: hsla(160, 79%, 46%, .1);
    --focus: hsl(160, 69%, 46%);
  }

  &[data-theme="blue"] {
    --primary-light: hsl(200, 79%, 46%);
    --primary-dark: hsl(200, 79%, 16%);
    --ripple: hsla(200, 79%, 46%, .1);
    --focus: var(--primary-light);
  }

  & {
    display: flex;
    align-items: center;

    margin-top: 8rem;
  }

}

// main
// ==========================================================
.switch {

  &:not(:last-of-type) {
    margin-right: 4rem;
  }

  &__label {
    position: relative;
    cursor: pointer;
  }

  &__input {
    opacity: 0;

    position: absolute;
    top: 50%;
    left: 50%;
    z-index: -1;
    transform: translate(-50%, -50%);
  }

  &__input:focus+&__design {
    box-shadow: 0 0 0 .1rem var(--global-background), 0 0 0 .2rem var(--focus);
  }

  // variables
  // ----------------------------------------------------
  & {
    --width: 6rem;
    --height: 3rem;

    --background: hsl(0, 0%, 30%);
    --checked-background: var(--primary-dark);

    --thumb-size: 1.6rem;
    --thumb-ripple-color: var(--ripple);
    --thumb-background: hsl(0, 0%, 65%);
    --checked-thumb-background: var(--primary-light);
    --thumb-space-between-edges: .6rem;
    --thumb-out: var(--thumb-space-between-edges);
  }

  &--1,
  &--3,
  &--5,
  &--7 {
    --width: 4rem;
    --height: 1.6rem;

    --thumb-size: 2rem;
    --thumb-space-between-edges: 0rem;
    --thumb-out: -.3rem;
  }

  &--2,
  &--6 {
    --background: hsla(0, 0%, 20%);
  }

  &--3,
  &--4 {
    --border: 1px solid hsl(0, 0%, 60%);
    --background: transparent;
  }

  &--7 {
    --width: 3rem;
    --thumb-out: calc((var(--thumb-size) / 2) - ((var(--thumb-size) / 2) * 2) + .2rem);
  }

  // appearance
  // ----------------------------------------------------
  &__design {
    display: inline-block;

    width: var(--width);
    height: var(--height);
    border: var(--border);
    border-radius: 100rem;

    background: var(--background);
    position: relative;

    transition: .2s, box-shadow 0s;
  }

  &__design::before {
    content: '';

    position: absolute;
    left: var(--thumb-out);
    top: 50%;
    transform: translateY(-50%);

    width: var(--thumb-size);
    height: var(--thumb-size);
    border-radius: 100rem;

    background: var(--thumb-background);

    transition: inherit;
  }

  &--5 &__input:not(:checked)+&__design,
  &--7 &__input:not(:checked)+&__design {
    --thumb-ripple-color: hsla(0, 0%, 65%, .1);
  }

  &--6 &__design {
    transition: .3s, box-shadow 0s;
  }

  // states
  // ----------------------------------------------------
  &__input:checked+&__design {
    border-color: transparent;
    background: var(--checked-background);
  }

  &__input:checked+&__design::before {
    left: calc(100% - (var(--thumb-size) + var(--thumb-out)));
    background: var(--checked-thumb-background);
  }

  &--6 &__input:checked+&__design::before {
    left: calc(100% - var(--thumb-out));
    transform: translate(-100%, -50%);
  }

  &--5 &__design:hover::before,
  &--7 &__design:hover::before,
  &--5 &__input:focus+&__design::before,
  &--7 &__input:focus+&__design::before {
    box-shadow: 0 0 0 .9rem var(--thumb-ripple-color);
  }

  &--6 &__design:active::before {
    width: calc(var(--thumb-size) + .4rem);
  }

}

.abs-site-link {
  position: fixed;
  bottom: 20px;
  left: 20px;
  color: hsla(0, 0%, 100%, .6);
  font-size: 1.6rem;
}
!

JS 

              
                // @AbubakerSaeed96 (twitter)
// abubakersaeed.netlify.com
// =========================

// 1&2 Simple
// 3&4 Outline/Border
// 5 Material Design-like
// 6 I've seen it on sites but I don't know what people call that design/effect (maybe liquid/or-like?)
// 7 Material Design-like (Half thumb out)

/*
  #keyboard-users: It's not an outline but more of a custom outline using box-shadow. All the effects that mouse users can see you'll get the same except for the sixth switch.
*/

/* Things to keep in mind.
=========================
  Colors:

    1. Outline Color (...that you'll see when you focus the switch) should be brighter than the background color of the switch. So that #keyboard-users can see/know which switch/item they are currently on. It can be same as thumb background color (as I used in my blue theme).

    2. Choose colors wisely. And don't just pick any color. I've tried purple (and even though I like purple...) it doesn't look good on switches.

==========================
These are for my component not saying you should not try/use in yours...
*/

// Thank You for viewing.
// ========================================

// Theming Stuff
const $ = e => document.querySelectorAll(e);

const _switches = $(".switches")[0];
const _colors = $("input[name='color']");

for (let i = 0; i < _colors.length; i++) {

  _colors[i].addEventListener("change", e => {
    if (e.target.checked) _switches.setAttribute('data-theme', e.target.value);
  })

}
!
999px

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