adding colors to the label panel

Unable to add a text description when adding a new color.

Example:
I add the color purple and want to add a text description which signifies that any/all index card with that purple color means that the entire chapter needs a re-write

I am able to add the color to the list and mark the index card with that color, but there is no text description in the “Inspector” area

see attached screengrab
purple.jpg