Chapman advocated the use of white footballs and numbered shirts, as well as adding hoops to Arsenal's socks to make it easier for players to pick each other out. He later made a further change to Arsenal's kit, adding white sleeves to the previously all-red shirt and brightening the colour, before a match against Liverpool on 4 March 1933; the same kit theme of red with white sleeves or trim survives to this day. The tradition of both teams walking out together at the FA Cup Final was started in 1930 due to Chapman's involvement with both clubs, and has continued since.