Ubiquity: Google Images search including search for colors

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noun_type_color = new CmdUtils.NounType( "Color",
  ["red", "orange", "yellow", "green", "blue", "black", "white", "grey", "brown", "purple", "magenta", "indigo", "pink"] );

CmdUtils.CreateCommand({
  name: "google-images",
  synonyms: ["pic", "image", "color"],
  takes: {search: noun_arb_text},
  modifiers: {in: noun_type_color},
  author: {name: "Christian Roth", email: "schnubby@traces-of-nuts.eu"},
  icon: "http://www.google.de/favicon.ico",
  description: "Searches Google Images , in a given color.",
  preview: function(pblock, directObject, mods) {
    var color = mods.in.text;
      var searchterm = directObject.text;
    if(searchterm.length < 1) {
        pblock.innerHTML = "Searches Google for images.";
    return;
    }
    if(color.length < 1) {
        pblock.innerHTML = "Searches Google Images for <b>" + searchterm + "</b>.";
    return;
    }
    pblock.innerHTML = "Searches Google Images for <b>" + searchterm + "</b> in <b>" + color + "</b>."
  },
  execute: function(directObject, mods, search) {
    var color = mods.in.text;
    var searching = directObject.text;
    var searchUrl = "http://images.google.de/images?imgcolor=" + color + "&q=" + searching
    if(color.length < 1) {
       var searchUrl = "http://images.google.de/images?q=" + searching;
    }
    Utils.openUrlInBrowser(searchUrl);
   }
});