Võ phục not necessarily adopted by all practitioners, as evidenced throughout 1973-1990 when many practitioners under a separate development of Vovinam, the "Viet Vo Dao Federation," wore black uniforms. By 1990, however, after further meetings between councils, indigo had been adopted by the majority of Vovinam practitioners in and outside of Vietnam. Deep blue/indigo (Vietnamese: Lam) is now the internationally accepted color of Vo Phuc for Vietnamese martial arts. The "võ phục" of Vovinam are very similar, if not nearly identical, to the "keikogi" of Japanese martial arts. Both top and bottom of the uniform are constructed in much the same way
Vovinam benevolent heart", the student is reminded of the main principle and the goal of Vovinam Việt Võ Đạo with every training. It is also about using the opponent's force and reaction, reaching maximum effect with comparatively little force. The term "Việt Võ Đạo" ("the way (Dao) of Viet Vo") was coined by the patriarch of the second generation of the Vovinam Viet Vo Dao, Le Sang, with the objective of adding a philosophical dimension to his martial art. This "Viet Vo Dao" consists of ten principles: (The wording can vary slightly between Vovinam schools) A "Việt Võ Đạo Federation" was