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 martial arts that prefer the hard over the soft and others that prefer the soft over the hard. Vovinam Việt Võ Đạo does not prefer any over the other. Hard and soft are used equally to adapt to every situation, to every problem. Based on Võ-Thuật, the student aims to develop the ability to combine hard and soft in combat and in daily life. This aims to develop physical abilities as well as the student's spirit. Not only the principle of the harmony of hard and soft but also many other things resulting from the training contribute to internalizing the