body {
  font-family: Arial, sans-serif;
  text-align: center;
  background: #f4f4f4;
}

.container {
  margin-top: 100px;
}

#colorBox {
  width: 200px;
  height: 200px;
  margin: 20px auto;
  background: #ffffff;
  border-radius: 10px;
  border: 2px solid #333;
}

button {
  padding: 10px 15px;
  margin: 10px;
  border: none;
  background: black;
  color: white;
  cursor: pointer;
  border-radius: 5px;
}

button:hover {
  background: #444;
}