[Plugin: Widget Context] Hack for custom taxonomies

I know very little about php so hacking this plugin is a pretty big challenge for me and one that is probably a little too big and I was wondering if someone could help.

I want to add the option to have widgets on particular taxonomies and I tried adding the middle lines in the following code to try get that to happen but to no avail.

if (is_category()) $currently['is_category'] = true;
if (taxonomy_exists('black')) $currently['taxonomy_exists'] = true;
if (is_tag()) $currently['is_tag'] = true;

and

. $this->make_simple_checkbox($options, $wid, $group, 'is_tag', __('Tag Archive'))
. $this->make_simple_checkbox($options, $wid, $group, 'taxonomy_exists', __('Black Post'))
. $this->make_simple_checkbox($options, $wid, $group, 'is_author', __('Author Archive'))

I also replacing the ‘taxonomy_exists’ with ‘is_tax’ but that didn’t work either.

I am trying to display widgets only on pages that are in the taxonomy: Color:black. Any ideas?

https://www.ads-software.com/extend/plugins/widget-context/