Most of the những người hâm mộ have marked some of their các câu lạc bộ with colours red=fanatic,yellow=die hard fan,green=deticated fan.How can I do this to some of my clubs?

No. Actually it`s not about a certain member "marking" the các câu lạc bộ with colors. Members who have a spot coloured have gained a MEDAL for that specific spot. bạn get a medal bởi adding stuff to the spot such as videos,images & picks. You`re likely to get a medal when the the content bạn add is non repeated and people actually rate it.

Those are medals. Read link