src/Tools/jEdit/dist-template/etc/isabelle-jedit.css

some message styling;

/* additional style file for Isabelle/jEdit output */

pre.message { margin-top: 0.3ex; background-color: #F0F0F0; }

.writeln { }
.priority { }
.tracing { background-color: #EAF8FF; }
.warning { background-color: #EEE8AA; }
.error { background-color: #FFC1C1; }
.debug { background-color: #FFE4E1; }

.hilite { background-color: #FFFACD; }