Changing the color of a selection to HEX

Question

Hi guys,
i'm new to illustrator scripting (but not to javascript or programming).
I have an AI file that has multiple layers. each layer has several items that are supposed to be of same color.
I have an array of HEX values.
I would like to loop over all items in a single layer, select them and change their color to some given HEX.
Once that works, I will run on all HEX entries in array and save each variation in a separate PNG file.
For the first part i wrote some script (see below), but i do not see any change in the file after i run the script. No errors and no change.
I run the script once i select all items in a specific layer.
Can you please advise what am i doing wrong?
Thanks in advance!
My code:
function hexToRgb(hex) {
    var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
    return result ? {
        r: parseInt(result[1], 16),
        g: parseInt(result[2], 16),
        b: parseInt(result[3], 16)
    } : null;
var fillRGBColor = function (pathItem, r, g, b){
    pathItem.fillColor.red = r;
    pathItem.fillColor.green = g;
    pathItem.fillColor.blue = b;
var fillHexColor = function (pathItems, hex){
    var rgb = hexToRgb(hex);
    alert(rgb.r +","+rgb.g+","+rgb.b);
    fillRGBColor(pathItems, rgb.r, rgb.g, rgb.b);
// check if a document is open in Illustrator.
if( app.documents.length > 0)
          mySelection = app.activeDocument.selection;
          if (mySelection.length > 0)  {
             for (var i=0; i<mySelection.length; i++) {
                  var currentObject = mySelection[i]; 
                  if(currentObject.typename != "CompoundPathItem" &&  
                                                            currentObject.typename != "GroupItem")  {
                         fillHexColor(currentObject, '#8F623B');
          } else {
                         alert("Nothing is selected.");
} else {
          alert("No document Open.");

Answer 1

Yup!
my objects were in CMYK mode and not RGB. i changed the handling and everything started working fine.
I have a different question now - how can i color TextFrame objects?
I have a layer with some text on it and i want to generate a bunch of PNG files from that layer with text color changes.
I see that the selected element is of type TextFrame, but it does not have a fillColor attribute.
what controls text color?
thanks in advance!