drupal/modules/block/block.css

/* $Id$ */

#blocks td.region {
  font-weight: bold;
}
#blocks td.block {
  padding-left: 1.5em; /* LTR */
}
.block-region {
  background-color: #ff6;
  margin-top: 4px;
  margin-bottom: 4px;
  padding: 3px;
}