Myth: Champion splash colors and sprite colors define their typical style of play.
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Blue/purple: These champions are the most likely to carry and have unique kits built around damage/ sustain. Almost always good to have on a team. Ex:



(you get the idea). -
Green/ Brown: These are your 'annoying to play against' champions. They can be anywhere (either due to high mobility or invisibility) and unexpectedly lead to your death before you even realized what happened. Another strength of the green group is that they can be very hard to kill immediately. Ex:


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Yellow: Your high risk high reward champions. Can either carry a game or cause their team to lose. Usually high DPS or a lot of CC with an ult that you wish was not a thing. Ex:

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Red: These Champions need to play aggressively to win. Playing passive is not in their minds. These will carry the game if fed, even if 4v5 under manageable circumstances. Try to punish them hard at every opportunity to keep them controlled. HIGHLY LIKELY TO ROAM Ex:

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White/Light Blue: These champions always have a use. They never seem to be fully shut down ever, and always pose the comeback threat. They also have an ability that regardless of how well they are doing, it benefits the entire team. Ex:

(if they are ice themed they seem fall in this category save Lissandra and Trundle because they belong in another color)
Yes I am aware that not all champions are used here. Their are too many to sort through and some that don't fit into category or fit into too many. This is just my observation as well. NONE OF THIS IS FACTUAL TO MY KNOWLEDGE. let me now what you think.