-td.di-b {background: #000; color: #DD6} /* bmp */
-td.di-d {background: #000; color: #CCC} /* rfc-1345 digraph */
-td.di-prop {background: #000; color: #CA8} /* proposed digraph */
-td.di-a {background: #000; color: #8BC} /* ascii */
-td.di-rare {background: #333} /* disfavoured */
-td.di-invalid {background: #200} /* impossible */
+td.l0 {background: #000; color: #DD6}
+td.l4 {background: #000; color: #CCC}
+td.l2 {background: #000; color: #CA8}
+td.l5 {background: #000; color: #8BC}
+td.ex {background: #333}
+td.u-invalid {background: #200} /* impossible */