<style type="text/css">
.ms-webpart-titleText.ms-webpart-titleText,
.ms-webpart-titleText > a {
    background-color: black;
    /* changes the background color of the web part header.  Hex too! #000000 */

    font-size: 20px;
    /* Font Size */

    font-weight: bold;
    /* Font bold, italics, */

    color: white;
    /*Font color */

    padding: 5px 5px;
    /*padding around fonts */
}