Chart fill opacity

I’ve been trying to resist posting as it must be such a simple answer to my question but I can’t seem to find any docs on the chart features. Specifically, I’m trying to change the fill opacity for donut and bar charts. I thought I could add something like fillOpacity or Opacity at the chart and dataset level but to no avail.

dmx-chart id="chart_metrics" responsive type="horizontalBar" width="600" height="300" fillOpacity=".9"

and

dataset-1:label="C" multicolor dataset-1:fillOpacity=".9"

As a note, I’m using a custom array of colors and they appear correctly except they are translucent which I’d prefer closer to solid.

Any help would be appreciated!