Perhaps it was better not to think about it anymore? – black, green and blue

Words of colour in the works of Nerval are not always easy to interpret. For example, why do we see black people in the scenario La Forêt Noire? In a quote from Mathurin Régnier, how should we understand the expression laisser sur le verd? Should we correct it by laisser sur le vers? And for what reason did the author use bleu and bleuâtre in an almost identical description? So many questions that intrigue readers and editors of texts.