Set window color for Chrome 39 Android 4.3+

window.themeColor.js

(function(window, document){
if (typeof window.chrome != "undefined") {
  document.themeColorMeta = document.createElement("meta");
  document.themeColorMeta.name = "theme-color";
  document.themeColorMeta.content = "transparent";
  document.head.appendChild(document.themeColorMeta);
  Object.defineProperty(window, "themeColor", {
    get: function(){
      return document.themeColorMeta.content;
    },
    set: function(color){
      document.head.removeChild(document.themeColorMeta);
      document.themeColorMeta.content = color;
      document.head.appendChild(document.themeColorMeta);
    } 
  });
};
}(window, document))

/* Usage
|  window.themeColor = "#db5945";
|  window.themeColor = "rgb(82, 171, 217)";
|  window.themeColor = "rgba(82, 171, 217, 0.5)"; //this does the same thing, no alpha is calculated.
|  console.log(window.themeColor);
*/