d3-scale-chromatic

This module provides sequential, diverging and categorical color schemes derived from Cynthia A. Brewer’s ColorBrewer. Since ColorBrewer publishes only discrete color schemes, the sequential and diverging scales are interpolated using uniform B-splines. These schemes and interpolators are designed to work with d3-scale’s d3.scaleOrdinal and d3.scaleSequential.

For example, to create a categorical color scale using the Accent color scheme:

var accent = d3.scaleOrdinal(d3.schemeAccent);

To create a sequential discrete nine-color scale using the Blues color scheme:

var blues = d3.scaleOrdinal(d3.schemeBlues[9]);

To create a diverging, continuous color scale using the PiYG color scheme:

var piyg = d3.scaleSequential(d3.interpolatePiYG);

Installing

If you use NPM, npm install d3-scale-chromatic. Otherwise, download the latest release or load directly from d3js.org as a standalone library. AMD, CommonJS, and vanilla environments are supported. In vanilla, a d3 global is exported:

<script src="https://d3js.org/d3-color.v1.min.js"></script>
<script src="https://d3js.org/d3-interpolate.v1.min.js"></script>
<script src="https://d3js.org/d3-scale-chromatic.v1.min.js"></script>
<script>

var yellow = d3.interpolateYlGn(0), // "rgb(255, 255, 229)"
    yellowGreen = d3.interpolateYlGn(0.5), // "rgb(120, 197, 120)"
    green = d3.interpolateYlGn(1); // "rgb(0, 69, 41)"

</script>

Or, in combination with the D3 default bundle:

<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="https://d3js.org/d3-scale-chromatic.v1.min.js"></script>
<script>

var yellow = d3.interpolateYlGn(0), // "rgb(255, 255, 229)"
    yellowGreen = d3.interpolateYlGn(0.5), // "rgb(120, 197, 120)"
    green = d3.interpolateYlGn(1); // "rgb(0, 69, 41)"

</script>

Try d3-scale-chromatic in your browser.

API Reference

Categorical

d3.schemeAccent Source

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

d3.schemeDark2 Source

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

d3.schemePaired Source

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

d3.schemePastel1 Source

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

d3.schemePastel2 Source

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

d3.schemeSet1 Source

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

d3.schemeSet2 Source

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

d3.schemeSet3 Source

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

Diverging

Diverging color schemes are available as continuous interpolators (often used with d3.scaleSequential) and as discrete schemes (often used with d3.scaleOrdinal). Each discrete scheme, such as d3.schemeBrBG, is represented as an array of arrays of hexadecimal color strings. The kth element of this array contains the color scheme of size k; for example, d3.schemeBrBG[9] contains an array of nine strings representing the nine colors of the brown-blue-green diverging color scheme. Diverging color schemes support a size k ranging from 3 to 11.

d3.interpolateBrBG(t) Source
d3.schemeBrBG[k]

Given a number t in the range [0,1], returns the corresponding color from the “BrBG” diverging color scheme represented as an RGB string.

d3.interpolatePRGn(t) Source
d3.schemePRGn[k]

Given a number t in the range [0,1], returns the corresponding color from the “PRGn” diverging color scheme represented as an RGB string.

d3.interpolatePiYG(t) Source
d3.schemePiYG[k]

Given a number t in the range [0,1], returns the corresponding color from the “PiYG” diverging color scheme represented as an RGB string.

d3.interpolatePuOr(t) Source
d3.schemePuOr[k]

Given a number t in the range [0,1], returns the corresponding color from the “PuOr” diverging color scheme represented as an RGB string.

d3.interpolateRdBu(t) Source
d3.schemeRdBu[k]

Given a number t in the range [0,1], returns the corresponding color from the “RdBu” diverging color scheme represented as an RGB string.

d3.interpolateRdGy(t) Source
d3.schemeRdGy[k]

Given a number t in the range [0,1], returns the corresponding color from the “RdGy” diverging color scheme represented as an RGB string.

d3.interpolateRdYlBu(t) Source
d3.schemeRdYlBu[k]

Given a number t in the range [0,1], returns the corresponding color from the “RdYlBu” diverging color scheme represented as an RGB string.

d3.interpolateRdYlGn(t) Source
d3.schemeRdYlGn[k]

Given a number t in the range [0,1], returns the corresponding color from the “RdYlGn” diverging color scheme represented as an RGB string.

d3.interpolateSpectral(t) Source
d3.schemeSpectral[k]

Given a number t in the range [0,1], returns the corresponding color from the “Spectral” diverging color scheme represented as an RGB string.

Sequential (Single Hue)

Sequential, single-hue color schemes are available as continuous interpolators (often used with d3.scaleSequential) and as discrete schemes (often used with d3.scaleOrdinal). Each discrete scheme, such as d3.schemeBlues, is represented as an array of arrays of hexadecimal color strings. The kth element of this array contains the color scheme of size k; for example, d3.schemeBlues[9] contains an array of nine strings representing the nine colors of the blue sequential color scheme. Sequential, single-hue color schemes support a size k ranging from 3 to 9.

d3.interpolateBlues(t) Source
d3.schemeBlues[k]

Given a number t in the range [0,1], returns the corresponding color from the “Blues” sequential color scheme represented as an RGB string.

d3.interpolateGreens(t) Source
d3.schemeGreens[k]

Given a number t in the range [0,1], returns the corresponding color from the “Greens” sequential color scheme represented as an RGB string.

d3.interpolateGreys(t) Source
d3.schemeGreys[k]

Given a number t in the range [0,1], returns the corresponding color from the “Greys” sequential color scheme represented as an RGB string.

d3.interpolateOranges(t) Source
d3.schemeOranges[k]

Given a number t in the range [0,1], returns the corresponding color from the “Oranges” sequential color scheme represented as an RGB string.

d3.interpolatePurples(t) Source
d3.schemePurples[k]

Given a number t in the range [0,1], returns the corresponding color from the “Purples” sequential color scheme represented as an RGB string.

d3.interpolateReds(t) Source
d3.schemeReds[k]

Given a number t in the range [0,1], returns the corresponding color from the “Reds” sequential color scheme represented as an RGB string.

Sequential (Multi-Hue)

Sequential, multi-hue color schemes are available as continuous interpolators (often used with d3.scaleSequential) and as discrete schemes (often used with d3.scaleOrdinal). Each discrete scheme, such as d3.schemeBuGn, is represented as an array of arrays of hexadecimal color strings. The kth element of this array contains the color scheme of size k; for example, d3.schemeBuGn[9] contains an array of nine strings representing the nine colors of the blue-green sequential color scheme. Sequential, multi-hue color schemes support a size k ranging from 3 to 9.

d3.interpolateBuGn(t) Source
d3.schemeBuGn[k]

Given a number t in the range [0,1], returns the corresponding color from the “BuGn” sequential color scheme represented as an RGB string.

d3.interpolateBuPu(t) Source
d3.schemeBuPu[k]

Given a number t in the range [0,1], returns the corresponding color from the “BuPu” sequential color scheme represented as an RGB string.

d3.interpolateGnBu(t) Source
d3.schemeGnBu[k]

Given a number t in the range [0,1], returns the corresponding color from the “GnBu” sequential color scheme represented as an RGB string.

d3.interpolateOrRd(t) Source
d3.schemeOrRd[k]

Given a number t in the range [0,1], returns the corresponding color from the “OrRd” sequential color scheme represented as an RGB string.

d3.interpolatePuBuGn(t) Source
d3.schemePuBuGn[k][k]

Given a number t in the range [0,1], returns the corresponding color from the “PuBuGn” sequential color scheme represented as an RGB string.

d3.interpolatePuBu(t) Source
d3.schemePuBu[k]

Given a number t in the range [0,1], returns the corresponding color from the “PuBu” sequential color scheme represented as an RGB string.

d3.interpolatePuRd(t) Source
d3.schemePuRd[k]

Given a number t in the range [0,1], returns the corresponding color from the “PuRd” sequential color scheme represented as an RGB string.

d3.interpolateRdPu(t) Source
d3.schemeRdPu[k]

Given a number t in the range [0,1], returns the corresponding color from the “RdPu” sequential color scheme represented as an RGB string.

d3.interpolateYlGnBu(t) Source
d3.schemeYlGnBu[k]

Given a number t in the range [0,1], returns the corresponding color from the “YlGnBu” sequential color scheme represented as an RGB string.

d3.interpolateYlGn(t) Source
d3.schemeYlGn[k]

Given a number t in the range [0,1], returns the corresponding color from the “YlGn” sequential color scheme represented as an RGB string.

d3.interpolateYlOrBr(t) Source
d3.schemeYlOrBr[k]

Given a number t in the range [0,1], returns the corresponding color from the “YlOrBr” sequential color scheme represented as an RGB string.

d3.interpolateYlOrRd(t) Source
d3.schemeYlOrRd[k]

Given a number t in the range [0,1], returns the corresponding color from the “YlOrRd” sequential color scheme represented as an RGB string.