Yeah,I noticed that too.Very interesting if you ask me.

i just take notice to the fact that his dragon is gold and not red.
and yeah i am aware of the fact that his cape is also and if the dragon was still going to be red then no one would see it.
but seriously, how hard would it be for them to change the color of the cape, we already know for a fact that one brother is connected to a gold dragon so i think it has something to do with that.