CSS - Custom selectors placeholder

We can change color and opacity in placeholder ;
::-webkit-input-placeholder { /* WebKit browsers */
    color:    #000;
}
:-moz-placeholder { /* Mozilla Firefox 4 to 18 */
    color:    #000;
    opacity:  1;
}
::-moz-placeholder { /* Mozilla Firefox 19+ */
    color:    #000;
    opacity:  1;
}
:-ms-input-placeholder { /* Internet Explorer 10+ */
    color:    #000;
}