Breakpoint scale range
https://observablehq.com/@jofremanchola/breakpoint-scalerange
Color scale, using multiple colors
https://observablehq.com/@lemonnish/color-scale-using-multiple-colors
https://observablehq.com/@jofremanchola/breakpoint-scalerange
https://observablehq.com/@lemonnish/color-scale-using-multiple-colors