The Biblical name, Edom, means RED.
Revelation prophecy uses [Edomite] RED to symbolize evil [the evil RED dragon in Rev 12 and the evil scarlet [RED] beast in Rev 17]
Evil antichrist Edomite-jew Bolsheviks [Communists] were called "Reds"
Interestingly, in the Russian civil war that followed the evil antichrist Bolshevik revolution... the antichrist Edomite-jew Bolsheviks' identifying color was RED [they were called the "Red Army"]... while the identifying color of Christian ethnic Russians was WHITE [they were called the "White Army!"]