Being an Arsenal fan myself... never knew you get tickets using miles.
If you are able .. enjoy the game..
So, if you are sitting at an away ground, and wish to wear the proud colours of Arsenal,
I would suggest a jacket to cover the colors until you enter the ground. (as long as you are not seated in the home area.
I have been to many away games with Arsenal , and have always been aware of my surroundings etc.
Enjoy
P.S. most ground suites require an attire and team colours are usually not permitted.