Title: Black Chrome
If you need help installing the theme please click here.
Copy and Paste the following code into your customize profile section in profile settings:

/* Get your free Plurk themes at http://www.freeplurkthemes.com */

body, html {
background: #000 url(http://www.freeplurkthemes.com/images/plurk-black-background.jpg);
color: #300021;
font-size: 90%;
font-family: “trebuchet ms”, helvetica, arial;
}

/* Hide Karma Creature */
#dynamic_logo { opacity:0;filter:alpha(opacity=0);zoom:1 }

#bottom_line {
border-top: #EEEEEE solid 1px;
border-bottom: #EEEEEE solid 1px;
background: #300021;
opacity:0.7;filter:alpha(opacity=70);
}
.day_bg {
opacity:0.7;filter:alpha(opacity=70);
}
.div_inner {
opacity:0.5;filter:alpha(opacity=50);
}

#filter_tab .off_tab {
color: #EEEEEE;
border: #aec8f1;
background: #2c2c2c;
opacity:0.7;filter:alpha(opacity=70);
text-decoration: none;
}

#filter_tab a {
border: #EEEEEE !important;
color: #333333;
text-decoration: none !important;
}

#timeline_holder {
background: #111 url(http://www.freeplurkthemes.com/images/plurk-black-background.jpg)
}

#top_bar a, #top_login a, #dashboard_holder a, #footer a {
color: #fff !important;
}
#dashboard_holder{
}
#plurk-dashboard {
background: #000 url(http://www.freeplurkthemes.com/images/plurk-black-background.jpg);
opacity:6.0;filter:alpha(opacity=60);
}
.dash-segment {
font-size:90%;
width: 225px;
}
#plurk-dashboard h2 {
color:#EEEEEE;
}

Enjoy!