td.Co {background: #322} /* private */
/* implementation-based alternatives */
-td.di-b {background: #411} /* bmp */
-td.di-d {background: #330} /* rfc-1345 digraph */
-td.di-prop {background: #321} /* proposed digraph */
-td.di-a {background: #030} /* ascii */
-td.di-aa {background: #00331D} /* ascii */
-td.di-rare {background: #222} /* disfavoured */
-td.di-invalid {background: #333} /* impossible */
+td.l0 {background: #411} /* bmp */
+td.l2 {background: #321} /* proposed digraph */
+td.l4 {background: #330} /* rfc-1345 digraph */
+td.l5 {background: #030} /* ascii */
+td.l6 {background: #00331D} /* ascii */
+td.ex {background: #222} /* disfavoured */
+td.u-invalid {background: #333} /* impossible */
/* general colorization */