People who lack the mental power to read. Having this mental disability causes them to lash out at other people with the same disability. They have to wear colors to recognize who is on their side because they cannot tell friends from enemies. They pretend to be tough but are such big pussies they will not go anywhere without a large number of people wearing the same colors.
When they fight they hold their guns diagonal towards the sky with one arm out and move their wrist downwards to point the gun (this is known as holding it "ghetto stlye" and is the trademark of their mental inability which causes a 200% drop in accuracy) at opposing gangs or police.
50 (or fiddy) cent and Snoop Dogg both claim to be from the bloods and crips.
50 cents inability to read and Snoop Doggs missing teeth support this claim.