ordinal.unknown([value]) If value is specified, sets the output value of the scale for unknown input values

d3.schemeCategory20b

d3.interpolateCubehelixDefault(t)

log.invert(value) See continuous

time.range([range]) See continuous

band.align([align]) If align is specified, sets the alignment to the specified value which must be in the range

band.padding([padding]) A convenience method for setting the

band.step() Returns the distance between the starts of adjacent bands.

d3.scaleLog() Constructs a new continuous scale with the

d3.interpolateRainbow(t)