Saint Barnabas was born in Cyprus. He was one of the early converts in Jerusalem and vouched for St Paul when he appeared before the elders there. He accompanied Paul on his first missionary journey and later went to Cyprus with his cousin John Mark (Mark the evangelist) to preach the gospel there. He was probably martyred at Salamis in Cyprus, some time before the year 61. See the articles in the Catholic Encyclopaedia and Wikipedia.

Cyprian was born in Carthage and spent most of his life in the practice of the law. He was converted to Christianity, and was made bishop of Carthage in 249. He steered the church through troubled times, including the persecution of the emperor Decius, when he went into hiding so as to be able to continue looking after the church. In 258 the persecution of the emperor Valerian began. Cyprian was first exiled and then, on the 14th of September, executed, after a trial notable for the calm and courtesy shown by both sides.

The theological virtue of hope is symbolized by the colour green, just as the burning fire of love is symbolized by red. Green is the colour of growing things, and hope, like them, is always new and always fresh. Liturgically, green is the colour of Ordinary Time, the orderly sequence of weeks through the year, a season in which we are being neither single-mindedly penitent (in purple) nor overwhelmingly joyful (in white).