[devote]

<label style="color:blue"><input type='checkbox' id="check1" name="file1" value="61"/>file1</label><br>

<script type="text/javascript">
    document.getElementById( 'check1' ).onclick = function() {
        if ( this.parentNode.style.color == "black" ) {
            this.parentNode.style.color = "blue";
        } else {
            this.parentNode.style.color = "black";
        }
    }
</script>