Criticizing and Studying the Whatness of Colours with Emphasizing Avicenna’s Opinion

Most of the traditional and Islamic philosophers believe in the realism of colours and think that the colours are physical properties and according to the natural sciences of every period (era) and their philosophy science has examined and determined the whatness of colours. The theory of realism about the whatness of colours compasses the opinions of philosophers before Avicenna and his opinions himself about colours but since the sayings of Mashaei (Peripatetic), Ishraqi (illuminative) and mutaʿaliyah (transcendent) philosophers from Avicenna by now have not changed notably and with a little change the same statements, subjects and opinions of Avicenna about colours have been transferred to the next books, too. It is important (noticeable) to investigate Avicenna’s opinions about the whatness of colours. Meanwhile presenting the traditional philosophers’ sayings this paper studies and narrates the whatness of colours by emphasizing Avicenna’s opinion; meanwhile, criticizing Avicenna’s opinion about the whatness of colours it is presented a new hypothesis that the whatness of colours is a composition of a process.