Investigate color palette for homepage dataset bar graph

[tsliaw]

The color palette can be confusing to users since there are repeating colors for categories, with only differences in saturation. Therefore users doesn't seem to be able to differentiate between those colors for those situations.

I've looked into this before and looked into typical visualization color palettes, but the colors for those palettes appeared to clash with the portal current color themes and look out of place. I'll investigate into how create a more expansive visualization palette that can maybe be based on our current color scheme for the portal.

This will impact other bar graphs used on the portal, including cells.