You punjabis are dumb. Red was worn by Bandai Sikhs and ascetics, Green was worn by the mughal army. We are told to wear blue garments by Pyara Bhai Daya Singh, the first of the panj pyare and we are told in rehat not to wear red or green. Who are you compared to Pyara Bhai Daya Singh?
Also in Karninama by Akali Guru Nanak Dev Ji it states that the Khalsa will wear blue.
Drop your ego. All you punjabis that wanna wear your red or green patiala shahi paghs to match your shirts and ties go ahead, but don't try and justify it with your manmat when its stated in maryada and you haven't bothered to look into it.