I'd like to be able to selectively turn off R/G/B channels on my Linux Mint 21 based (X11) PC (to simulate color blindness). As of now I understand ICC color profiles a bit, so I understand ICC tries to correct colors to produce proper original - hence it is not possible to have a profile that drops one of the colors.

Please give some hints (including source code edit if no other available) to achieve my goal. TIA

P.S. web search for "to simulate color blindness linux" found e.g. https://colororacle.org/, it changes one frozen displayed window, it is useful, still I'd like to have an X11 solution.