It would be somewhat revealing if someone countered a charge of racism by pointing out that they don’t dye their hair.Not every Remainer is a blue-haired angry cancel-culture fanatic, but every angry blue-haired cancel culture fanatic almost certainly voted Remain. Arguments like that are so ridiculous.
There also will be many Remainers who hold some racist attitudes. For some reason "racism" seems to be considered by some a phenomenon of white people. Look at what happened in Peckham recently. There was racism from Asians to Black people and vice versa.