<header>
  <h2 class="title">element.style.backgroundColor</h2>
  <p class="description">Встановлює або повертає колір фону елемента.</p>
</header>
<main>
  <div class="result">
    <div class="color-box"></div>
    <div class="controls">
      <input type="color" id="bgColor" value="#ff0000">
      <button id="applyColor">Застосувати колір</button>
    </div>
  </div>
</main>
body {
  font-size: 16px;
  line-height: 1.5;
  font-family: monospace;
}

header {
  background-color: #f1f1f1;
  margin-bottom: 25px;
  padding: 15px;
  -webkit-box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
  -moz-box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
  box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
}

header h2.title {
  padding-bottom: 15px;
  border-bottom: 1px solid #999;
}

header p.description {
  font-style: italic;
  color: #222;
}

.result {
  background-color: #f8f8f8;
  padding: 15px;
  -webkit-box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
  -moz-box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
  box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
}

.color-box {
  width: 200px;
  height: 200px;
  background-color: #ff0000;
}

.controls {
  margin-top: 15px;
}
const colorBox = document.querySelector('.color-box');
const bgColorInput = document.getElementById('bgColor');
const applyColorBtn = document.getElementById('applyColor');

applyColorBtn.addEventListener('click', () => {
  const selectedColor = bgColorInput.value;
  colorBox.style.backgroundColor = selectedColor;
});

External CSS

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External JavaScript

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