Heat Bar Visual

Hello,

I've been asked to add something along the lines of a heatbar (preferably one that will adjust as new data is added but I'm perfectly okay with adjusting things manually).

My first thought was, I'll just use a stacked bar visuals and apply a conditinal format with the gradiation option, buuuuuut, apparently that isn't an option for the stacked bar visuals.

Does anyone else have a suggestion on how to go about it?  I've attached an example provided.