Looking for javascript to automate for project. Grab layer change color by 10 RGB points

Here’s a start, this increments the red channel (Edit: Save As PNG will keep the fill colors accurate on a reopen):

app.preferences.rulerUnits = Units.INCHES;

var f = Folder.selectDialog("Select a folder for the Saved JPEGs");
var so = new PNGSaveOptions();
var sc = [255,255,255];
var n = 10
var doc, fc, hx;
doc = app.documents.add(10, 10, 72, hx);


//increments the red channel
for (var i = 255; i >= 0; i -= n) {
    sc[0]=i;
    fc = makeRGB(sc);
    hx = fc.rgb.hexValue;  
    doc.selection.fill(fc);
    doc.saveAs(new File(f + "/" + hx + ".png"), so);   
}

doc.close();

/**
* Makes and returns an RGB color 
* @9397041 a an array of RGB values
* @Returns a SolidColor 
* 
*/	

function makeRGB(a){
    colorobj = new SolidColor()
    colorobj.rgb.red = a[0];
    colorobj.rgb.green = a[1];
    colorobj.rgb.blue = a[2]; 
    return colorobj;
};

An iteration of changes by 10 values would not seem to result in 16mio colors, so please explain what you are actually trying to do in more detail. 

Why hex-color-names? 

What output do you actually want – images or a txt-file or …?