Generate a number of complementary colors using the golden ratio

generateComplementaryColors.js

function generateComplementaryColors ( numberToGenerate ) {
  /**
   * I: Three arguments are the number of complementary colors to generate (integer > 0), 
   * O: A set of color and pattern
   * Credit for the inspiration to use the golden ratio goes to Martin Ankerl who wrote:
   *  https://martin.ankerl.com/2009/12/09/how-to-create-random-colors-programmatically/
   * NB: Definitions of helperfunctions `rgbFromHSL` and `hexFromRGB` can be found here:
   *  https://gist.github.com/stephencweiss/eab510dabb2ba50652434372e46b5980
   */

  const goldenRatio = 1.61803398749895;
  const colors = []
  const patterns = ['plus', 'cross', 'dash', 'cross-dash', 'dot', 'dot-dash', 'disc', 'ring', 'line', 'line-vertical', 'weave' , 'zigzag', 'zigzag-vertical', 'diagonal', 'diagonal-right-left','square', 'box', 'triangle', 'triangle-inverted', 'diamond', 'diamond-box']
  const saturation = 0.8;
  const lightness = 0.5;

  let hue = Math.random();
  for (let i = 0; i < numberToGenerate; i += 1) {
    hue = goldenRatio * hue;
    hue %= 1;
    const huePrime = Math.round(hue * 360)
    const [red, green, blue] = rgbFromHSL(huePrime, saturation, lightness)
    const color = hexFromRGB(red, green, blue);
    const pattern = patterns[Math.floor(patterns.length * Math.random())]
    colors.push({ color, pattern })
  }
  return colors;
}