https://opg.optica.org/oe/fulltext.cfm?uri=oe-30-2-1036&id=466401 "Optics Express Vol. 30, Issue 2, pp. 1036-1055 (2022) • https://doi.org/10.1364/OE.447375 General solution to the calculation of peak luminance of primaries in multi-primary display systems Binghui Yao, Liquan Zhu, Yuhua Yang, Guan Wang, Chun Gu, and Lixin Xu" According to this modern displays (tm) can use more than 3 primary colors ... We must be happy that all this encapsulated by some black box monitor firmware ;)