d3.schemeSet3 An array of twelve categorical colors represented as RGB hexadecimal strings.

d3.schemeSet2 An array of eight categorical colors represented as RGB hexadecimal strings.

d3.schemeSet1 An array of nine categorical colors represented as RGB hexadecimal strings.

d3.schemePastel2 An array of eight categorical colors represented as RGB hexadecimal strings.

d3.schemePastel1 An array of nine categorical colors represented as RGB hexadecimal strings.

d3.schemePaired An array of twelve categorical colors represented as RGB hexadecimal strings.

d3.schemeDark2 An array of eight categorical colors represented as RGB hexadecimal strings.

d3.schemeCategory20c An array of twenty categorical colors represented as RGB hexadecimal strings. This color scale includes color specifications and designs developed by Cynthia Brewer (colorbrewer2.org).

d3.schemeCategory20b An array of twenty categorical colors represented as RGB hexadecimal strings.

d3.schemeCategory20 An array of twenty categorical colors represented as RGB hexadecimal strings.