Seven-Coloured Rasengan

The Seven-Coloured Rasengan is a Rasengan, coloured by the light reflecting from mirror generator in the Land of Snow. This colouring gave the chakra used for the Rasengan the appearance of a rainbow. Judging by how far it causes the opponent to fly, it may be that the multicoloured chakra is not just a colourful sight, but somehow increases its power as well.

Trivia

 * This technique is also shown in one of the Naruto opening themes, Re:member (Opening 8).