put this in your custom header

<style type="text/css">
body {
  background-color: #000000;
  scrollbar-arrow-color: #ff9900;
  scrollbar-track-color: #ff3399;
  scrollbar-shadow-color: #ffff66;
  scrollbar-face-color: #66ff33;
  scrollbar-highlight-color: #B991C9;
  scrollbar-darkshadow-color: black;
  scrollbar-3dlight-color: black;
  }
.left, .blogbody, table.footer, .standard, .leftmodulefontcolor, td, p {
/* edits main text */
  font:normal 11px arial;
  line-height:10px;
  color:#ff3399;
  letter-spacing:0px;
  text-align:justify;
  }
table.footer TD {
/* this makes the footer at the bottom centered */
/* leave it alone unless you know what to do*/
  text-align: center;
  }
div.blogheader, .caption {
/* edits the dates */
  font-family: arial;
  text-transform:lowercase;
  font-size:11px;
  line-height:10px;
  font-weight:bold;
  color:#ff9900;
  letter-spacing:0px;
  background-color: black;
  text-align: left;
  }
a:link, .footernav.link, a.footernav:link, a.footernav:active {
/* edits all links */
  color:#ff9900;
  text-decoration: none;
 font: normal 11px arial;
  }
a:visited, a.footernav:visited,  {
/* edits the links that the user has visited */
  color:#ffff33;
  text-decoration: none;
   font: normal 11px arial;
  }
a:hover {
/* edits when user mouseovers the links */
  color:#66ff00;
  cursor: crosshair;
  text-decoration: none;
   font: normal 11px arial;
  }
input, select, textarea, .textfield, .button {
/* this edits the buttons, dropdowns, etc. */
  border: 1px solid #66ff00;
  font:normal 11px arial;
  background-color: black;
  letter-spacing:0px;
  color: #ff3399;
  }
table.left {
/* this edits the menu module */
  border: 1px solid #66ff00;
  width:160px;
   background-color: #000000;
  }
table.blogbody {
/* this edits the other the place where the  blog is */
  border: 1px solid #66ff00;
  background-color: black;
  width:400px;
  }
table.left th {
/* on your menu module, this edits the title part of it */
/* like BLOGRINGS, POSTING CALENDAR, etc */
  background-image: url(http://url.com/to/the/site/image.gif);
  background-color: #000000;
  font: normal 11px arial;
  text-transform: lowercase;
  color: #ff9900;
  border: 1px solid #66ff00;
  }
table.left TD {
/* on your menu module, this edits the body part of it */
  background-image: url(http://url.com/to/the/site/image.gif);
  background-color: #000000;
  border: none;
  }
table.search TD, table.search, table.announcements {
/* border of search bar (if you have it) */
  background-color: black;
  border: 1px solid #66ff00;
  }
table.search TD, table.announcements TH {
/* this should be left alone */
/* unless you know what to do */
  border: 0px solid #c0c0c0;
  }
table.navigation, table.main, table.footer {
/* the width of your blog with modules */
  width: 500px;
  }
hr {
/* horizontal divider */
  border: 1px solid #66ff00;
  }
</style>