Built-in palettes

List all available palette names:

swatch.palettes();   // ["viridis", "magma", ..., "Dark2"]

Matplotlib perceptually-uniform

viridis, magma, plasma, inferno, cividis

ColorBrewer 2.0

Sequential

Blues, Greens, Reds, Oranges, Purples, Greys

Diverging

RdBu, RdYlBu, PiYG, BrBG, Spectral

Qualitative

Set1, Set2, Set3, Pastel1, Dark2

Usage

swatch.scale("viridis").colors(9);
swatch.scale("RdBu").domain([-1, 1])(0);     // midpoint of diverging scale
swatch.scale("Set1").classes(8).colors(8);    // 8 discrete qualitative colors