For those who want to support paris in the client: use the 2015 world championship summoner icon

it was available for 1 ip before and during worlds, and it uses the colours of blue and red teams, with a white icon in the middle = kinda has the french colours on it

or the 2014 all star icon

http://vignette3.wikia.nocookie.net/leagueoflegends/images/d/d8/ProfileIcon931_Worlds_2015.png/revision/latest/scale-to-width-down/64?cb=20150910212235&format=webp