index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Challenge</title>
    <link rel="stylesheet" href="colorRanges.css"
  </head>
  <body>
    <form>
      <label for="RedDial">RED</label>
      <input
        type="range"
        id="RedDial"
        min="0"
        max="255"
        onchange="turnColor()"
      />
      <input type="text" id="readRed" size="3" value="0" readonly />
      <br />
      <label for="GreenDial">GREEN</label>
      <input
        type="range"
        id="GreenDial"
        min="0"
        max="255"
        onchange="turnColor()"
      />
      <input type="text" id="readGreen" size="3" value="0" readonly />
      <br />
      <label for="BlueDial">BLUE</label>
      <input
        type="range"
        id="BlueDial"
        min="0"
        max="255"
        onchange="turnColor()"
      />
      <input type="text" id="readBlue" size="3" value="0" readonly />
      <br />

      <div id="square" class="squareColor"></div>
    </form>
    <script src="./colors.js"></script>
  </body>
</html>