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 color = d3.scaleOrdinal(d3.schemeAccent);

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

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

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.

# d3.schemeAccent <>

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

# d3.schemeDark2 <>

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

# d3.schemePaired <>

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

# d3.schemePastel1 <>

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.schemeSet1 <>

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

# d3.schemeSet2 <>

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

# d3.schemeSet3 <>

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

# d3.interpolateBrBG(t) <>
# d3.schemeBrBG

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) <>
# d3.schemePRGn

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) <>
# d3.schemePiYG

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) <>
# d3.schemePuOr

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) <>
# d3.schemeRdBu

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) <>
# d3.schemeRdGy

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) <>
# d3.schemeRdYlBu

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) <>
# d3.schemeRdYlGn

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) <>
# d3.schemeSpectral

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

# d3.interpolateBlues(t) <>
# d3.schemeBlues

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) <>
# d3.schemeGreens

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) <>
# d3.schemeGreys

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) <>
# d3.schemeOranges

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) <>
# d3.schemePurples

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) <>
# d3.schemeReds

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

# d3.interpolateBuGn(t) <>
# d3.schemeBuGn

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) <>
# d3.schemeBuPu

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) <>
# d3.schemeGnBu

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) <>
# d3.schemeOrRd

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) <>
# d3.schemePuBuGn

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) <>
# d3.schemePuBu

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) <>
# d3.schemePuRd

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) <>
# d3.schemeRdPu

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) <>
# d3.schemeYlGnBu

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) <>
# d3.schemeYlGn

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) <>
# d3.schemeYlOrBr

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) <>
# d3.schemeYlOrRd

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