  We study $(d-1)$-dimensional excitations in the $d$-dimensional color code
that are created by transversal application of the $R_{d}$ phase operators on
connected subregions of qubits. We find that such excitations are
superpositions of electric charges and can be characterized by fixed-point
wavefunctions of $(d-1)$-dimensional bosonic SPT phases with
$(\mathbb{Z}_{2})^{\otimes d}$ symmetry. While these SPT excitations are
localized on $(d-1)$-dimensional boundaries, their creation requires operations
acting on all qubits inside the boundaries, reflecting the non-triviality of
emerging SPT wavefunctions. Moreover, these SPT-excitations can be physically
realized as transparent gapped domain walls which exchange excitations in the
color code. Namely, in the three-dimensional color code, the domain wall,
associated with the transversal $R_{3}$ operator, exchanges a magnetic flux and
a composite of a magnetic flux and loop-like SPT excitation, revealing rich
possibilities of boundaries in higher-dimensional TQFTs. We also find that
magnetic fluxes and loop-like SPT excitations exhibit non-trivial three-loop
braiding statistics in three dimensions as a result of the fact that the
$R_{3}$ phase operator belongs to the third-level of the Clifford hierarchy. We
believe that the connection between SPT excitations, fault-tolerant logical
gates and gapped domain walls, established in this paper, can be generalized to
a large class of topological quantum codes and TQFTs.
