Cant change bar colors if large number of bars in bar chart...

Cant change bar colors if large number of bars in bar chart...

I am trying to customize the colors of a bar graph using Zoho Reports and I have found that on two of my bar graphs that have approximately 10 bars I am unable to select the "click to change the color" button. I see the bubble pop up with "click to change the color" but when I click nothing happens. Nothing happens when I select change legend colors as well. Both graphs have a variable in the color field on the edit settings graph tab. Is there anyway to work around this so that I can modify these chart's colors to match my other charts?

I have tried filtering the data that is plotted on the chart and changing the chart type. Nothing allows me to change the color of these data points. 

Thanks, 
Lexie