<input value="Texto ingresado con value" onfocus="if(this.value=='Texto ingresado con value')this.value='';"  
onblur="if(this.value=='')this.value='Texto ingresado con value';">
<input placeholder="Texto ingresado con placeholder">

input::-webkit-input-placeholder {
  color: #e74c3c;
}
input:-moz-placeholder {
  color: #e74c3c;
}
input:-ms-input-placeholder {
  color: #e74c3c;
}
input[placeholder] {
  color: #2980b9;
}

body {
  background-color: #2c3e50;
}
input {
  display: block;
  font: 300 14px "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial;
  color: gray;
  background: #ecf0f1;
  border: 5px inset #7f8c8d;
  text-shadow: 0 -1px 1px white;
  box-shadow: 3px 3px 1px #34495e;
  border-radius: 15px 15px 15px 15px;
  width: 280px;
  padding: 10px 20px;
  margin: 10px auto;
  outline: 0;
}