function invert_key_value(obj) {  
    var result = {};  
    var keys = _keys(obj);  
    for (var i = 0, length = keys.length; i < length; i++) {  
      result[obj[keys[i]]] = keys[i];  
    }  
    return result;  
  }  
function _keys(obj)   
  {  
    if (!isObject(obj)) return [];  
    if (Object.keys) return Object.keys(obj);  
    var keys = [];  
    for (var key in obj) if (_.has(obj, key)) keys.push(key);  
    return keys;  
  }  
function isObject(obj)   
 {  
    var type = typeof obj;  
    return type === 'function' || type === 'object' && !!obj;  
  }  
console.log(invert_key_value({red: "#FF0000", green: "#00FF00", white: "#FFFFFF"}));