IPython change input cell syntax highlighting logic for entire session

Question

You can use extensions or display helpers in IPython to make whatever syntax highlighting you\'d like on output cells.

For some special cell magics, like

Answer 1

For recent IPython version, the selected answer no longer works. The 'config_default' property was renamed options_default (Ipython 6.0.0). The following works:

import IPython
js = "IPython.CodeCell.options_default.highlight_modes['magic_fortran'] = {'reg':[/^%%fortran/]};"
IPython.core.display.display_javascript(js, raw=True)