<div class="notice">
  Your browser does not support the <code>accent-color</code> property.
</div>

<form action="">
  <fieldset>
    <h2>Checkboxes</h2>
    <div>
      <label for="checkbox">
        Default
      </label>
      <input id="checkbox" type="checkbox" checked>
    </div>
    <div>
      <label for="checkbox-accent">
        Accent
      </label>
      <input id="checkbox-accent" type="checkbox" class="accent" checked>
    </div>
  </fieldset>

  <fieldset>
    <h2>Radio</h2>
    <div>
      <input id="radio" type="radio" checked>
      <label for="radio">
        Default
      </label>
    </div>
    <div>
      <input id="radio-accent" type="radio" class="accent" checked>
      <label for="radio-accent">
        Accent
      </label>
    </div>
  </fieldset>

  <fieldset>
    <h2>Progress</h2>
    <div>
      <label for="progress">
        Default
      </label>
      <progress id="progress" min="0" max="100" value="50"></progress>
    </div>
    <div>
      <label for="progress-accent">
        Accent
      </label>
      <progress id="progress-accent" class="accent" min="0" max="100" value="50"></progress>
    </div>
  </fieldset>

  <fieldset>
    <h2>Range</h2>
    <div>
      <label for="range">
        Default
      </label>
      <input id="range" type="range">
    </div>
    <div>
      <label for="range-accent">
        Accent
      </label>
      <input id="range-accent" class="accent" type="range">
    </div>
  </fieldset>
</form>

body {
  display: grid;
  padding: 3rem 0;
}

.accent {
  accent-color: #30cc7e;
}

form {
  display: grid;
  grid-auto-columns: fit-content(50%);
  grid-template-areas: "a a";
  margin: auto;
  padding: 0;
  gap: 1rem;
}

form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin: auto;
}

form section:first-child {
  color-scheme: light;
}
form section:last-child {
  color-scheme: dark;
}

fieldset {
  border-radius: 8px;
  color-scheme: light;
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem;
}

.dark {
  color-scheme: dark;
}

.dark fieldset {
  background: #100f33;
  border-color: #100f33;
  color: #fff;
}

.dark .accent {
  accent-color: hsla(180, 100%, 70%, 1);
}

h2 {
  margin: 0;
}

.notice {
  background: #fff9c4;
  border-radius: 6px;
  margin: 1.5rem auto;
  padding: 0.5rem;
  text-align: center;
}

@supports (accent-color: #fff) {
  .notice {
    display: none;
  }
}