Hi,
I am trying to replication the same bar chart in chartjs2 as displayed in this stackoverflow ticket: https://stackoverflow.com/questions/31791034/how-to-set-a-full-length-background-color-for-each-bar-in-chartjs-bar/31875649#31875649

Could would really appreciate any assistance in achieving this?
You can make a stacked bar chart where the data value for each point in the second dataset is 90 minus the value in the first dataset.
@benmccann's answer is what I was going to suggest. That's the easiest way to achieve this. An alternative is a plugin that goes and draws the background but it would need to be able to figure out where the bars are which is difficult.
Most helpful comment
You can make a stacked bar chart where the data value for each point in the second dataset is 90 minus the value in the first dataset.