Forum:Volume covers

No idea where else to post this, so will do so in here. Are the covers being drawn by Kishimoto himself/his team or by other people afterwards? I have noticed many differences and contradictions, and wonder if they should be taken seriously. For example, one art shows Naruto's Rasengan as yellow (this is correct) but other as blue. The Gedo Statue has been shown to be brown in manga, while on cover it's grey, among others. --Elveonora (talk) 21:11, November 24, 2012 (UTC)