@fabger: Actually detail color picker option is there in Pro version. But for the free version, you need to do it manually using custom css. You can change the color code in the following css as per your need and then add it in “Appearance => Theme Options => Custom CSS” box.
/* Page Background & Text Color */
#content article {
background-color: #fff;
color: #444;
}
/* Page Title Color */
.entry-title, .entry-title a {
color: #222;
}
/* Header Background Color */
#header-content {
background-color: #fff;
}