Function convertHexColorToRgba

lib/colorUtils.js:161–180

* Convert a CSS hex color code (#00EE00) to rgba() format * @param {string} hex hex color code (#00EE00). Short form is also accepted i.e. #03F for #0033FF)

(hex)

 * @param {string} hex hex color code (#00EE00). Short form is also accepted i.e. #03F for #0033FF)
 */
function convertHexColorToRgba(hex) {
  // Expand shorthand form (e.g. "#03F") to full form (e.g. "#0033FF")
  const shorthandRegex = /^#([a-f\d])([a-f\d])([a-f\d])$/i
  const hexFull = `${hex}`.replace(shorthandRegex, (m, r, g, b) => {
    return r + r + g + g + b + b
  })

  const result = /^#([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hexFull)
  if (!result) {
    // Return untouched if not a hex code
    return hex
  }

  const r = parseInt(result[1], 16)
  const g = parseInt(result[2], 16)
  const b = parseInt(result[3], 16)
  const a = 1

  return `rgba(${r}, ${g}, ${b}, ${a})`
}

/**
 * Convert a colour to a normalised RGBA format