body{
	backgroundcolor: turquoise;
}
.colorrojo:focus {
  background: burlywood;
  color: red;
}

.colorazul:focus {
  background: orangered;
  color: blue;
}

form {
  border: 1px solid;
  color: hotpink;
  padding: 4px;
}

form:focus-within {
  background: #fd8;
  color: black;
}

input {
  margin: 4px;
}