The immediate effect of the Plessy v. Ferguson decision was that Segregation in public became "separate but equal." This just means that the standards for the segregation law remains and was not totally eliminated but the decision considered the equal rights of citizen for a humane and dignified living.
The Plessy v. Ferguson decision determined that “separate but equal” was legal, which meant that segregation was legal. Right after the decision, States passed segregationist legislation and expanded Jim Crow.
