body {
  background-color: #f4f4f4;
}

.color-box {
  width: 500px;
  height: 500px;
}

.color1 {
  background-color: #FF0000;
}

.color2 {
  background-color: rgb(255, 255, 0);
}

.color3 {
  background-color: blue;
}

.color4 {
  background-color: hsl(138, 82%, 47%);
}

.color5 {
  background-color: orange;
}