Grunt target to find and replace in bulk colors of the uncompressed fla file (xfl)

Gruntfile-colorizefla.js

var path = require('path');
module.exports = function(grunt) {
    // Project configuration.
    grunt.initConfig({
        colorizefla: {
            blacknwhite: {
                colors: [
                    {name: "Color1", from: "#A8B89D", to: "#666666"},
                    {name: "Color2", from: "#C2D1B6", to: "#999999"}
                ]
            },
            ice: {
                colors: [
                    {name: "Color1", from: "#A8B89D", to: "#7EB7D9"},
                    {name: "Color2", from: "#C2D1B6", to: "#9FCFED"},
                ]
            }
        }
    });
    grunt.registerMultiTask("colorizefla", function () {
        var colorList = this.data.colors || [];
        var suffix = this.target;
        var base = "resources/img/skins/sprites";
        var destination = base + "-" + suffix;
        grunt.file.expand({cwd: base}, "**/*.*").forEach(function(file) {
            var isXMLFile = grunt.file.isMatch("**/*.xml", file);
            grunt.log.debug("Copy: " + file);
            grunt.log.debug("File is XML: " + isXMLFile);
            grunt.file.copy(path.join(base, file), path.join(destination, file), isXMLFile && {
                process: function(content, srcpath) {
                    colorList.forEach( function(c) {
                        grunt.log.debug("Replacing: " + c.from + "-->" + c.to);
                        content = content.replace(new RegExp(c.from, "g"), c.to);
                    });
                    return content;
                }
            });
        });
    });
};