The flag of Vietnamese Republic by Vietnam National Restoration League :
The word "King" (王) symbolizes the constitutional monarchy.
Red (#EF4135) background symbolizes struggle for independence.
White (#FFF) background symbolizes "cleanliness of the people".
Own work using: Flag of Vietnam National Restoration League and the Republic of Vietnam Mặc hoàng bào dù chẳng được làm vua
南文會館