Gets RGB, HEX, and CMYK values from a Pantone

getPantoneData.js

/*

How to use:
  Go to pantone.com
  open console
  paste the below function
  
  Run with getPantoneData('123 c').then(...)
  
It returns an object with the format:
{
  pantone: '123-C',
  rgb: [255, 199, 44],
  hex: 'FFC72C',
  cmyk: [0, 19, 98, 0]
}

*/

function getPantoneData(pantone) { // pantone in format '123-C', '124 cp', etc
  const colourString = pantone.trim().replace(/ /g, '-').toLocaleUpperCase()  // format string to url end

  return fetch('https://www.pantone.com/color-finder/' + colourString)
  .then(r=>r.text())
  .then(data => {
    stripped = data.replace(/\s*/g, '')
    regex = /spanclass="values">([A-Z0-9]{6}|\d+)/g // Regex to find hex/numbers from the html string
    arr = []
    while(match = regex.exec(stripped)) { // = assigns, rather than == (catches nulls)
      arr.push(match[1])
    }
    
    return {
      pantone: colourString.replace('-', ' '),
      rgb: [arr[0], arr[1], arr[2]],
      hex: arr[3],
      cmyk: [arr[4], arr[5], arr[6], arr[7]]
    }
  })
}

Basic usage:

getPantoneData('123 c').then(console.log)

Get hex values from array of pantones:

pantones = ['123 c', '124 c', '456 c']

Promise.all(pantones.map(pantone => getPantoneData(pantone)))
.then(responses => {
  responses.forEach(response => console.log('#' + response.hex))
})