Google histogram Query

Hi Team,

We are using "googleHistogramChartField"  by "Appcino Technologies" the requirement is 

Is it possible to color the boxes (of reach composition) based on the overall risk (green, yellow, red)

I was unable to find any setting for the same 

https://developers.google.com/chart/interactive/docs/gallery/histogram

can anyone suggest that how we can implement histogram in Appian without 3rd party plugin

Regards

Bihitak