Night Triumphant - and the Stars Eternal. If he was the sweet, terrifying darkness I was the glittering light that only his shadows could make clear. ― Sarah J. Maas, A Court of Wings and Ruin

X/N stands for Xeno Nigra, that is, Strange Black.
While the abb. atricolor means dark-coloured in latin.
Feel free to join if you love the combo of black and white.