code: def get_go2color_users(self,
                             usrgo_color='#feffa3', # yellow
                             hdrusrgo_color='#d4ffea', # green
                             hdrgo_color='#eee6f6'): # purple
          
          go2color = {}
          # Color user GO IDs
          for goid in self.usrgos:
              go2color[goid] = usrgo_color
          # Color header GO IDs. Headers which are also GO IDs get their own color.
          for goid_hdr in self.hdrgos_actual:
              go2color[goid_hdr] = hdrusrgo_color if goid_hdr in self.usrgos else hdrgo_color
          return go2color
docs: Get go2color for GO DAG plots.