Colours play an important role in our lives, cultures, religion which shows a deep meaning which goes beyond the beautification values. The painters and artists who make the idols of Gods and Goddesses use colours with a specific purpose as each colour symbolises a different trait. And most of the colours used for the religious ceremonies are unprocessed e.g. yellow is taken from turmeric, wheat flour is used for white colour , leaves provide green colour etc. But the most widely used colour is Saffron and it have distinctive meaning in all religions.
In Hinduism, the saffron colour signifies the colour of fire ( Agni). Fire symbolises the burning of darkness and thus produce light which can be interpreted as a symbol of knowledge blazing ignorance. Saffron is a colour mostly used by saints which indicates purity and self-discipline. For the seer, saffron colour builds an image symbolizing the quest for Knowledge or something related to sainthood or the people who have turned down worldly possessions for seeking peace.
It is also considered as a battle colour of the warrior caste, Rajputs.
If you might have noticed Nishan Sahibs (Sikh flags) fluttering atop the Gurdwaras, saffron is the colour which is used. Saffron cholas are worn by Panj pyaras as well. In Sikhism saffron colour represents harmony, bliss and joy. It is believed to soak up all the sickening experiences and distress. Saffron colour gives a sense of belongingness to the community.
As far as Buddhism is concerned , saffron colour is used by monks or the followers of Buddha. It is being told that when Buddha gave up his mortal body , he was covered in saffron robe so ever since monks adopted this colour and it is considered as a colour of moksha.
So we can conclude that saffron colour fastens together different religions and thus connotes traits like courage, purity, will power etc .