I would like to show what a number means instead of the number itself.

I have a survey with groups of questions. If all questions are answered 'Yes', then the answer for that group is 'Yes', otherwise the answer for that group is 'No'.

Right now, each item has a score (No == 0, Yes == 1). I am taking the minimum of the score and placing that in the Color field in the pivot chart. The data is properly plotted on the chart, but the legend on the chart shows '0 and below' and 'above 0'. I would like it to show 'Yes' and 'No'. What would be the best approach?