Read the color of a Colorized Grayscale Image

I've been working on a script to compile all of the colors present in a file and I'd been hung up on Colorized Grayscale images. I tried digging into the 'Colorants' property but couldn't really get any info out of it. Yesterday I was able to figure out a hack to get to the color info. If you select the image, then create a new path, it'll keep the same fill and stroke colors. Here's a bit of code to select the image, create a temporary PathItem, then read the colors, and then blast it, all while preserving any previous selections.

#target illustrator
function AlertFillColorName(){
    if( !app.documents.length ) return;
    var doc = app.activeDocument;
    
    if( !doc.rasterItems.length ) return
    var myImg = doc.rasterItems[0];
    
    if( !myImg.colorizedGrayscale ) {
        alert( "top-most image is not a colorized grayscale" );
        return;
    }
    
    // store current selection, clear selection, select current shape
    var curSel = doc.selection;
    doc.selection = null;
    myImg.selected = true;
    
    // create temp path
    var tempPath = doc.pathItems.add();
    
    // if there's a fill color present
    if( tempPath.filled ) {
        
        var fill = tempPath.fillColor;
        
        // if fill color is a SpotColor
        if( fill.typename == 'SpotColor' ) {
            alert( "Fill color is " + fill.spot.name );
        }
    
        // if fill color is an RGBColor
        else if( fill.typename == 'RGBColor' ) {
            alert( "Fill color is R=" + fill.red + " G=" + fill.green + " B=" + fill.blue );
        }
    }
    
    // blast the temp path
    tempPath.remove();
    
    // reassign the previous selection
    myImg.selected = false;
    doc.selection = curSel;
}
AlertFillColorName();

If I mixed anything up or if you know of a more elegant method please let me know! 🙂

I still haven't figured out a good way to colorize a grayscale image with a spot color through a script though...

Thanks!