background_colour_time_of_day.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Time-Based Background</title>
  <style>
    body {
      transition: background-color 1s ease;
      color: white;
      font-family: sans-serif;
      text-align: center;
      padding-top: 20%;
    }
  </style>
</head>
<body>
  <p>The background color changes based on the time of day.</p>

  <script>
    function setBackgroundByTime() {
      const hour = new Date().getHours();
      let bgColor;

      if (hour >= 6 && hour < 12) {
        // Morning
        bgColor = "#FFD580"; // light orange
      } else if (hour >= 12 && hour < 18) {
        // Afternoon
        bgColor = "#87CEEB"; // light blue
      } else if (hour >= 18 && hour < 21) {
        // Evening
        bgColor = "#FFA07A"; // salmon
      } else {
        // Night
        bgColor = "#2F4F4F"; // dark slate gray
      }

      document.body.style.backgroundColor = bgColor;
    }

    // Set background on page load
    setBackgroundByTime();
  </script>
</body>
</html>