Tumblr (http://www.tumblr.com/dashboard) dashboard custom css for ROMs

tumblr.css

#right_column, 
#new_post, 
.selection_nipple, 
#sidebar_footer_nav {
  display: none;
}

#left_column {
  float: none;
}

div.post {
  width: 770px;
}

body, 
div#content, 
input.search_query.popover_button, 
input.search_query_submit, 
div.search_form_row {
  background: #333;
}

div.clearfix {
  padding-top: 0;
}