HTML/CSS - Background Changer Online Editor and JavaScript Compiler

html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Background Color Changer</title>
  <link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Henny+Penny&display=swap" rel="stylesheet">
  <link rel="stylesheet" href="style.css">
</head>
<body >
  <div class="container" id="box">
    <div class="header">
      <span value="tomato" class="color1"></span>
      <span value="teal" class="color1"></span>
      <span value="slateblue" class="color1"></span>
      <span value="orangered" class="color1"></span>
      <span value="magneta" class="color1"></span>
      <span value="deeppink" class="color1"></span>
    </div>
  </div>
  <div class="text">
    Background  <br>
    Changer !
  </div>

css

*{
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
body{
  background-color: rgb(64, 143, 109);
}
.container{
  height: 100vh;
  display: flex;
  justify-content: center;
 
}
.header{
  width: 100%;
  height: 50px;
  background-color: white;
  display: flex;
  justify-content: space-around;
  padding: 5px;
}
.header span[value="tomato"]{
  position: relative;
  height: 40px;
  width: 40px;
  border-radius: 50%;

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