Random colors

swatch.random();

Constrained ranges

swatch.random({ hue: [180, 240] });              // ocean hues
swatch.random({ lightness: [0.4, 0.7] });        // mid-range lightness
swatch.random({ chroma: [0.1, 0.2] });           // moderate saturation
swatch.random({ space: "oklch" });                // sample in OKLCh

Seeded PRNG

Pass a seed for reproducible results (xorshift32):

swatch.random({ seed: 42 });    // always the same color
swatch.random({ seed: 42 });    // same again

Useful for tests, generative art, and deterministic palettes.