Index: /applications/editors/josm/i18n/convstyle.pl
===================================================================
--- /applications/editors/josm/i18n/convstyle.pl	(revision 29953)
+++ /applications/editors/josm/i18n/convstyle.pl	(revision 29954)
@@ -23,5 +23,8 @@
   elsif($line =~ /colour="([^"]+)#/)
   {
-    print "/* color $1 */ tr(\"$1\");\n";
+    my $c = $1;
+    my $co = $1;
+    $c =~ s/[^a-z0-9]+/./g;
+    print "/* color $co */ tr(\"$c\");\n";
   }
   else