Can I automatically colorize every text line in a text with a selected color swatch?

//@target illustrator
app.preferences.setBooleanPreference("ShowExternalJSXWarning", false); // Fix drag and drop a .jsx file

// Main function
function main() {
  // Define the color array in the desired order
  // RGB format [10, 100, 250]
  // CMYK format [100, 0, 20, 50]
  // HEX with quotes "#0000FF"
  var colorArr = [
    "#0000FF",
    "#37AA32",
    "#F39100"
  ];

  if (!documents.length) return;
  
  var doc = app.activeDocument;
  var tfs = getTextFrames(app.selection);
  var selSw = doc.swatches.getSelected();
  var hasSelSw = selSw.length > 0;
  
  // If doc has selected swatches, use them
  if (hasSelSw) colorArr = selSw;
  
  // Set colors
  for (var j = 0; j < colorArr.length; j++) {
    colorArr[j] = hasSelSw ? colorArr[j].color : setColor(colorArr[j]);
  }

  for (var j = 0; j < tfs.length; j++) {
    var tfLines = tfs[j].textRange.lines;
    for (var k = 0; k < tfLines.length; k++) {
      var idx = k % colorArr.length;
      tfLines[k].fillColor = colorArr[idx];
    }
  }
}

// Get TextFrames array from collection
function getTextFrames(coll) {
  var tfs = [];
  for (var i = 0, len = coll.length; i < len; i++) {
    if (/text/i.test(coll[i].typename)) 
      tfs.push(coll[i]);
    else if (/group/i.test(coll[i].typename)) 
      tfs = tfs.concat(getTextFrames(coll[i].pageItems));
  }
  return tfs;
}

function setColor(data) {
  var isRGB = activeDocument.documentColorSpace == DocumentColorSpace.RGB;
  var c = isRGB ? new RGBColor() : new CMYKColor();
  if (data instanceof Array) {
    if (isRGB) {
      c.red   = data[0] !== 'undefined' ? getValidRGB(data[0]) : 0;
      c.green = data[1] !== 'undefined' ? getValidRGB(data[1]) : 0;
      c.blue  = data[2] !== 'undefined' ? getValidRGB(data[2]) : 0;
    } else {
      c.cyan    = data[0] !== 'undefined' ? getValidCMYK(data[0]) : 100;
      c.magenta = data[1] !== 'undefined' ? getValidCMYK(data[1]) : 100;
      c.yellow  = data[2] !== 'undefined' ? getValidCMYK(data[2]) : 100;
      c.black   = data[3] !== 'undefined' ? getValidCMYK(data[3]) : 100;
    }
  } else if (typeof data === "string" && data.match(/#[0-9A-Fa-f]{1,6}/g)) {
    var arr = hex2rgb(data);
    if (!isRGB) arr = rgb2cmyk(arr);
    return setColor(arr);
  }
  return c;
}

// Check number is in the range 0-255
function getValidRGB(n) {
  if (n > 255) return 255;
  if (isNaN(n) || n == "" || n < 0) return 0;
  return n;
}

// Check number is in the range 0-100
function getValidCMYK(n) {
  if (n > 100) return 100;
  if (isNaN(n) || n == "" || n < 0) return 0;
  return n;
}

// Convert HEX to RGB color
function hex2rgb(hex) {
  var hex = hex.replace(/[^0-9A-F]/gi, "");
  if (hex.length == 3) {
    hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
  } else if (hex.length && hex.length < 6) {
    hex = ("000000" + hex).slice(-6);
  }
  return hex.length ? [
      parseInt(hex.substr(0, 2), 16),
      parseInt(hex.substr(2, 2), 16),
      parseInt(hex.substr(4, 2), 16)
    ] : [];
}

// Convert RGB to CMYK color
function rgb2cmyk(rgb) {
  var arr = convertColor('RGB', 'CMYK', rgb);
  for (var i = 0, len = arr.length; i < len; i++) {
    arr[i] = Math.round(arr[i]);
  }
  return arr;
}

// Convert color via native converter
function convertColor(src, dest, srcColor) {
  return app.convertSampleColor(ImageColorSpace[src], srcColor, ImageColorSpace[dest], ColorConvertPurpose.defaultpurpose);
}

// Run script
try {
  main();
} catch (e) {}

Upd 12-oct: Added HEX support and array number validation for RGB / CMYK formats.