Take the final answer of each segment, in the order of the rainbow (ROYGBIV). 

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Red answer=_____

Orange answer=_____

Yellow answer=_____

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Not only does it spell something that is true to the Game Master, but when smashed together, it's your website extension: 

www.yourmysteryparty.com/________________

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DO NOT USE CAPS ON THE WEB ADDRESS - it is all lowercase letters!