Mike Bostock

Observable

Components

D3 Charts

I wasn't able to figure out how to set the attribute for the colors 

https://observablehq.com/@john-guerra/us-federal-budget-outlays

Am I missing something? I couldn't figure it out from the documentation

John Alexis Guerra Gómez

Tricky! You could use :
  color: (x) => d3.interpolateRainbow(x * 100)

the trouble here is that there are 240 children of the root, and the visible ones are the first ten—with the default interpolateRainbow scheme they all have about the same hue.

Ahhh I see it now, quite confusing imo :)