unwanted color changes in VT100.js about shellinabox HOT 1 OPEN

In fact this isn't using the default white-on-black.css but the following which
exactly mimics colors used in the default xterm under debian:

#vt100 #scrollable          { color:            #ffffff;
                              background-color: #000000; }
#vt100 #scrollable.inverted { color:            #000000;
                              background-color: #ffffff; }

#vt100 .ansi0               {                 }
#vt100 .ansi1               { color: #cd0000; }
#vt100 .ansi2               { color: #00cd00; }
#vt100 .ansi3               { color: #cdcd00; }
#vt100 .ansi4               { color: #0000ee; }
#vt100 .ansi5               { color: #cd00cd; }
#vt100 .ansi6               { color: #00cdcd; }
#vt100 .ansi7               { color: #e5e5e5; }
#vt100 .ansi8               { color: #7f7f7f; font-weight: bold; }
#vt100 .ansi9               { color: #ff0000; font-weight: bold; }
#vt100 .ansi10              { color: #00ff00; font-weight: bold; }
#vt100 .ansi11              { color: #e8e800; font-weight: bold; }
#vt100 .ansi12              { color: #5c5cff; font-weight: bold; }
#vt100 .ansi13              { color: #ff00ff; font-weight: bold; }
#vt100 .ansi14              { color: #00ffff; font-weight: bold; }
#vt100 .ansi15              { color: #ffffff; font-weight: bold; }

#vt100 .bgAnsi0             { background-color: #000000; }
#vt100 .bgAnsi1             { background-color: #cd0000; }
#vt100 .bgAnsi2             { background-color: #00cd00; }
#vt100 .bgAnsi3             { background-color: #cdcd00; }
#vt100 .bgAnsi4             { background-color: #0000ee; }
#vt100 .bgAnsi5             { background-color: #cd00cd; }
#vt100 .bgAnsi6             { background-color: #00cdcd; }
#vt100 .bgAnsi7             { background-color: #e5e5e5; }
#vt100 .bgAnsi8             { background-color: #7f7f7f; }
#vt100 .bgAnsi9             { background-color: #ff0000; }
#vt100 .bgAnsi10            { background-color: #00ff00; }
#vt100 .bgAnsi11            { background-color: #e8e800; }
#vt100 .bgAnsi12            { background-color: #5c5cff; }
#vt100 .bgAnsi13            { background-color: #ff00ff; }
#vt100 .bgAnsi14            { background-color: #00ffff; }
#vt100 .bgAnsi15            {                            }