How to use the chroma-js.cmyk function in chroma-js

function adjust(base, expected, baseVar) {
  const _base = chroma(base);
  const _expected = chroma(expected);
  const mixee = chroma.cmyk(cmykLinear(_base.cmyk(), _expected.cmyk()));

  const _actual = chroma.mix(base, mixee);
  const _actualHsl = _actual.hsl().slice(1, -1);
  const _expectedHsl = _expected.hsl().slice(1, -1);

  const differences = _actualHsl.map((channel, idx) => {
    return channel - _expectedHsl[idx];
  });
  const saturationAdjustment = _.round(differences[0] * -100, 6).toString();
  const lightnessAdjustment = _.round(differences[1] * -100, 6).toString();

  return _l(_s(_b(baseVar, mixee.css('hsl'), 50, false), saturationAdjustment), lightnessAdjustment);
}

swatches.forEach((e, i) => {
    const hex = chroma.cmyk(cv(e.cmyk))
    const rgb = chroma(hex).rgb()
    const colorObject = {
      "index": i + 1,
      "name": e.name,
      "slug": returnSlug(e.name),
      "cmyk_array": e.cmyk,
      "cmyk": `C:${e.cmyk[0]} / M:${e.cmyk[1]} / Y:${e.cmyk[2]} / K:${e.cmyk[3]}`,
      "rgb_array": rgb,
      "rgb": `R:${rgb[0]} / G:${rgb[1]} / B:${rgb[2]}`,
      "hex": `${hex}`,
      "combinations": e.combinations,
      "use_count": e.combinations.length
    }
    colorList.push(colorObject)
  })
  return colorList