On gold and yellow in mystical Islamic dreams:
http://www.myislamicdream.com/search.html?txtSearch=gold&cmdSearch=Search
http://www.myislamicdream.com/yellow_colour_meaning_istikhara.html
Not really good colors, unless you mean gold like gold jewelry.
Makes me wonder if the ‘All the world’ banner uses gold as ‘sand’ or ‘sun’ and symbolizes the Peacock throne or a variation of the drape and colors of the kaaba.