Display three columns

3_columns.css

/*HTML not included!*/
footer {
  background: #c0392b;
  overflow: hidden;
  width: 100%;
}

footer div {
  background: #e74c3c;
  float: left;
  outline: 1px solid #000;
  width: 33.33%;
}

footer div p {
  padding: 10px;
}

.blue-color {
  background: #3498db;
}

.green-color {
  background: #40d47e;
}

.red-color {
  background: #e74c3c;
}