The fourth MoE for a tank should be that nation's flag's colors (shiny and mettalic) instead of purely gold.
●USA: Red mark, white mark, blue mark.
●USSR: Red, gold, red.
●China: Red, gold, red.
●France: Blue, white, red.
●UK: Yeah idk, just make their MoE tea leaves or smth. Half blue half white, red, half white half blue.
●Germany (WW2): Red, black, white.
●Germany (CW): Black, red, gold.
●Italy: Green, white, red.
●Poland: White, half white half red, red.
●Israel: White, blue, white.
●Czechoslovakia: Blue, red, white.
●Sweden: Blue, gold, blue.
●Mercenary: One color from each nation it has parts from.
●Romania: Blue, gold, red.