Overriding of the standard placeholder in CSS

To recolor or to change transparancy of placeholders use such CSS selectors:

#myInput::-webkit-input-placeholder { /* WebKit browsers */
    color:    #FF0000;
    opacity: 1;
}
#myTextArea:-moz-placeholder { /* Mozilla Firefox 4 to 18 */
    color:    #FF0000;
    opacity: 1;
}
#mySomething::-moz-placeholder { /* Mozilla Firefox 19+ */
    color:    #FF0000;
    opacity: 1;
}
:-ms-input-placeholder { /* Internet Explorer 10+ */
    color:    #FF0000;
    opacity: 1;
}

placeholdersCSS