[quote=@The Survivor]
There is something I don't get, in the show there are troopers and squads that are color coded but they don't necessarily follow up with the wiki page. Like a whole squad of yellow clones with a certain design or a squad of blue clones with a stripe down the middle. Hell, Rex is a Captain but he's blue when the wiki says red. It seems to be regardless of rank sometimes. Can someone explain that to me?
[/quote]

That was how the Kaminoans originally intended to distinguish between the ranks of their clones. However after the battle of Geonosis the Jedi felt that having all the clones in the same plain white armor with the only variations being rank color didn't allow for the clones to have individuality. The Jedi preaches that even though all the clones were genetically identical, they were each a separate and individual living entity in the Force. They wanted the Kaminoans to allow all clones to fully personalize their armor but refused. Then after about two weeks the debate settled on a compromise in which each Jedi general selected a color for their Legion of Clones. This color could be used by the officers and the veterans in the legion to personalize their armor. The clones were then also allowed to cut/dye their hair and tattoo themselves throughout all ranks of the army. 

Hope that helped.