In the title compound, C(20)H(18)B(2)F(4)N(6), the bis-(5,7-dimethyl-1,8-naphthyridin-2-yl)diazene molecule is bis-ected by a symmetry centre midway between the central N atoms of the diazene group. Each of the symmetry-related halves of the molecule binds to a B atom through an N,N'-bite. Two terminal F ions complete the distorted BN(2)F(2) tetra-hedral geometry around each B atom. The BF(2) plane is almost perpendicular to the boron-naphthyridine ring plane, with a dihedral angle of 87.8 (2)°. The main inter-actions in the crystal structure are some C-H⋯F hydrogen bonds and π-π contacts between 1,8-naphthyridine rings [centroid-centroid distance = 4.005 (1) Å].