Codice

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.blue {
  background-color: #00f;
  color: #000;
}
.rosso {
  background-color: #f00;
  color: #000;
}
.verde {
  background-color: #0f0;
  color: #000;
}
.giallo {
  background-color: #ffa;
  color: #000;
}
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