Worked Gauge-Mapping Micro-Example
Explicitly mapping a few
N,w,T
tuples to (Q, T3, Y) and the color class c (mod 3).

Hypercharge functional

Electric charge is $Q=T_3+\tfrac{1}{2}Y$. The color class is $c=(N+2w+T)\bmod 3$.
Field(N,w,T)ChiralityT3YQc mod 3Notes
ν_L(1,0,2)L0.5-1.000000-0.0000000lepton (colorless)
e_L(1,1,1)L-0.5-1.000000-1.0000001lepton (colorless)
e_R(1,1,1)R0.0-2.000000-1.0000001lepton (colorless)
u_L(0,2,2)L0.50.3333330.6666670quark (color via c mod 3)
d_L(0,1,3)L-0.50.333333-0.3333332quark (color via c mod 3)
u_R(1,3,4)R0.01.3333330.6666672quark (color via c mod 3)
d_R(2,2,2)R0.0-0.666667-0.3333332quark (color via c mod 3)
Values align with the narrative examples: Y(ℓ_L) = -1, Y(e_R) = -2, Y(q_L) = +1/3, Y(u_R)=+4/3, Y(d_R)=-2/3, giving Q consistent with SM assignments.