---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-9-92c02e7b010c> in <module>
----> 1 epochs['face'].plot(events=events, event_colors={'buttonpress': 'red'})

/opt/mne/python/mne/epochs.py in plot(self, picks, scalings, n_epochs, n_channels, title, events, event_colors, order, show, block, decim, noise_cov, butterfly, show_scrollbars, epoch_colors)
   1051                            noise_cov=noise_cov, butterfly=butterfly,
   1052                            show_scrollbars=show_scrollbars,
-> 1053                            epoch_colors=epoch_colors)
   1054 
   1055     @copy_function_doc_to_method_doc(plot_epochs_psd)

/opt/mne/python/mne/viz/epochs.py in plot_epochs(epochs, picks, scalings, n_epochs, n_channels, title, events, event_colors, order, show, block, decim, noise_cov, butterfly, show_scrollbars, epoch_colors)
    850     _prepare_mne_browse_epochs(params, projs, n_channels, n_epochs, scalings,
    851                                title, picks, events=events, order=order,
--> 852                                event_colors=event_colors, butterfly=butterfly)
    853     _prepare_projectors(params)
    854 

/opt/mne/python/mne/viz/epochs.py in _prepare_mne_browse_epochs(params, projs, n_channels, n_epochs, scalings, title, picks, events, event_colors, order, butterfly, info)
   1110     if events is not None:
   1111         event_set = set(events[:, 2])
-> 1112         event_colors = _handle_event_colors(event_set, event_colors, event_set)
   1113         epoch_nr = False  # epoch number off by default to avoid overlap
   1114         for label in ax.xaxis.get_ticklabels():

/opt/mne/python/mne/viz/misc.py in _handle_event_colors(unique_events, color, unique_events_id)
   1035             if this_event not in unique_events_id:
   1036                 raise ValueError('Event ID %s is in the color dict but is not '
-> 1037                                  'present in events or event_id.' % this_event)
   1038 
   1039         for this_event in unique_events_id:

ValueError: Event ID buttonpress is in the color dict but is not present in events or event_id.

</details>