Currently we support only "color" : https://shacl-play.sparna.fr/play/draw#custom-nodeShapes, which is actually interpreted as the background color of the box. But we can't customize the text color, so it is impossible to set a black background with white text.
Currently we support only "color" : https://shacl-play.sparna.fr/play/draw#custom-nodeShapes, which is actually interpreted as the background color of the box. But we can't customize the text color, so it is impossible to set a black background with white text.