h1, p, li{
  font-size: 1.2em;
  font-weight: normal;
}

h1{
  background-color: lightBlue;
  color: RGB(128,0,128);/*Equivalent à HSL(300, 100%, 25%)*/
  border: 5px solid RGBa(128,0,128);
}

.p1{
  color: RGBa(128,0,128,0.2)
}

.p2{
  background-color: lightBlue;
  color: RGBa(128,0,128, 0.6);
}

.conteneur{
  background-color: lightBlue;
  color: HSLa(300, 100%, 25%, 60%);
  border: 5px solid purple;
}