  The color transparency (CT) of a hadron, propagating with reduced absorption
in a nucleus, is a fundamental property of QCD (quantum chromodynamics)
reflecting its internal structure and effective size when it is produced at
high transverse momentum, $Q$. CT has been confirmed in many experiments, such
as semi-exclusive hard electroproduction, $e A \to e' \pi X$ for mesons
produced at $Q^2 > 3 ~ {\rm GeV}^2$. However, a recent JLab (Jefferson
Laboratory) measurement for a proton electroproduced in carbon $e\, {\rm C}\to
e' p X$, where $X$ stands for the inclusive sum of all produced final states,
fails to observe CT at $Q^2$ up to 14.2 GeV$^2$. In this paper, the onset of CT
is determined by comparing the $Q^2$-dependence of the hadronic cross sections
for the initial formation of a small color-singlet configuration using the
generalized parton distributions from holographic light-front QCD. A critical
dependence on the hadron's twist, $\tau$, the number of hadron constituents, is
found for the onset of CT, with no significant effects from the nuclear medium.
This effect can explain the absence of proton CT in the present kinematic range
of the JLab experiment. The proton is predicted to have a "two-stage" color
transparency with the onset of CT differing for the spin-conserving (twist-3,
$\tau=3$) Dirac form factor with a higher onset in $Q^2$ for the spin-flip
Pauli (twist-4) form factor. In contrast, the neutron is predicted to have a
"one-stage" color transparency with the onset at higher $Q^2$ because of the
dominance of its Pauli form factor. The model also predicts a strong dependence
at low energies on the flavor of the quark current coupling to the hadron.
