He āhuatanga o tētahi mea ka kitea e te karu, ka hua ake i te āhua o taua mea ki te whakaata, ki te miti rānei i te aho ka tau atu ki a ia. Kei roto i te pūaho ngā tae katoa o te āniwaniwa. Ka pā te aho ki tētahi mea, ka mitia ngā ngaru autōhiko o ētahi o ngā tae o roto i te aho, ka whakaatangia ngā ngaru autōhiko o ētahi, ā, koia nei ngā tae o taua mea e kitea ana e te karu tangata.
A visual property of an object which results from the way that object reflects or absorbs the light which lands on it. White light is made up of all the colours of the rainbow. When light touches an object, the electromagnetic waves corresponding to some of the colours in the light are absorbed. The electromagnetic waves of some of the colours are reflected, and these are the colours of that object which are seen by the human eye.