static/themes/metro-gray/propertygrid.css

.propertygrid .datagrid-view1 .datagrid-body td {
  padding-bottom: 1px;
  border-width: 0 1px 0 0;
}
.propertygrid .datagrid-group {
  height: 21px;
  overflow: hidden;
  border-width: 0 0 1px 0;
  border-style: solid;
}
.propertygrid .datagrid-group span {
  font-weight: bold;
}
.propertygrid .datagrid-view1 .datagrid-body td {
  border-color: #dedede;
}
.propertygrid .datagrid-view1 .datagrid-group {
  border-color: #c7ccd1;
}
.propertygrid .datagrid-view2 .datagrid-group {
  border-color: #dedede;
}
.propertygrid .datagrid-group,
.propertygrid .datagrid-view1 .datagrid-body,
.propertygrid .datagrid-view1 .datagrid-row-over,
.propertygrid .datagrid-view1 .datagrid-row-selected {
  background: #c7ccd1;
}