This work is about the Reformation (500th anniversary) and addresses the profound changes that it caused in society. The braids are white, because white is the color of purity, innocence and the sacred. The monks had the courage to touch the supposedly sacred, to question old precepts and to cut the "holy braids" with which they initiated the Reformation. Thus they became the black sheep of the church. The black cassock is a symbol of it.
In addition, the limitation to black and white alludes to the way of thinking in "black and white" that was as common at that time as it is today.