isolation

isolation: auto;

isolation: isolate;

<section class="default-example" id="default-example">
  <div class="background-container">
    <div id="example-element">
      <img src="/shared-assets/images/examples/firefox-logo.svg" />
      <p><code>mix-blend-mode: multiply;</code></p>
    </div>
  </div>
</section>

.background-container {
  background-color: #f4f460;
  width: 250px;
}
#example-element {
  border: 1px solid black;
  margin: 2em;
}
#example-element * {
  mix-blend-mode: multiply;
  color: #8245a3;
}

/* キーワード値 */
isolation: auto;
isolation: isolate;
/* グローバル値 */
isolation: inherit;
isolation: initial;
isolation: revert;
isolation: unset;

<div id="b" class="a">
  <div id="d">
    <div class="a c">auto</div>
  </div>
  <div id="e">
    <div class="a c">isolate</div>
  </div>
</div>

.a {
  background-color: rgb(0, 255, 0);
}
#b {
  width: 200px;
  height: 210px;
}
.c {
  width: 100px;
  height: 100px;
  border: 1px solid black;
  padding: 2px;
  mix-blend-mode: difference;
}
#d {
  isolation: auto;
}
#e {
  isolation: isolate;
}