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.

Users
Naruto Uzumaki

Classification
Ninjutsu

Class
Offensive

Range
Short-range