Edit in JSFiddle

body {
    font-size: 40px;
    font-family: Tahoma;
    font-weight: bold;
    
    background-color: #CCC; /*X birim ton*/
    color: #AAA; /*X + 2 birim ton*/
    text-shadow:
        0px 1px 1px #EEE, /* X - 2 birim ton */
        0px -1px 1px #888 /* X + 4 birim ton */;
    
}