A way to visualize multidimensional racial demographic data for census tracts. This uses a square root scale instead of a linear scale, and uses 3 colors that are all the same saturation and luminance (in the HCL color space).
Fetching of American Community Survey data inspired by Observable: Racial distribution in NC by Mark McClure.
The variables used are documented in the ACS API Reference.
Color legend from VizHub: Color and Size Legends.