  Color scalars are salient features of non-minimal SU(5) model, where Higgs
sector is extended by 45-dimensional multiplet. We show that gauge coupling
unification can be realized in this model with TeV octet scalar and
intermediate (~10^6 GeV) color-triplet scalar at scale larger than 10^{15} GeV.
We analyze the possible LHC signatures of these TeV octet scalars. We emphasize
that multi-(b)-jet final states provide significant signal for direct probe of
octet scalars at the LHC.
