  We argue that the higher weak isospin $SU(3)_L$ manifestly unifies dark
matter and normal matter in its isomultiplets for which dark matter carries a
conserved dark charge while normal matter does not. The resultant gauge
symmetry is given by $SU(3)_C\otimes SU(3)_L \otimes U(1)_X\otimes U(1)_G$,
where the first factor is the color group, while the rest defines a theory of
scotoelectroweak in which $X$ and $G$ determine electric charge
$Q=T_3-1/\sqrt{3}T_8+X$ and dark charge $D=-2/\sqrt{3}T_8+G$. This setup
provides both appropriate scotogenic neutrino masses and dark matter stability
as preserved by a residual dark parity $P_D=(-1)^D$. Interpretation of the dark
charge is further discussed, given that $SU(3)_L$ is broken at very high energy
scale.
