Are you allowed to carry a can of white spray paint and spray those who wear colored shirts?
BTW, there is a Mishna which says that if a baal tefila says I will only daven for the amud wearing white, we suspect him of being an apikorus, and he may not daven even if he wears colors. There never was any such mesora to wear white. I was always taught on Shabbos to wear white. Isn’t it a disgrace to Shabbos if we wear white during the week, as well?