  The recent data on $W+$dijet excess reported by CDF may be interpreted as the
associated production of a $W$ and a new particle of mass about 150 GeV which
subsequently decays into two hadron jets. We study the possibility of
explaining the $W+$dijet excess by colored scalar bosons. There are several
colored scalars which can have tree level renormalizable Yukawa couplings with
two quarks, $({\bf 8}, {\bf 2},1/2)$, $(\bar{\bf 6}({\bf 3}), {\bf 3}({\bf 1}),
-1/3)$, $(\bar {\bf 6}({\bf 3}), {\bf 1}, -4/3(2/3))$. If one of these scalars
has a mass about 150 GeV, being colored it can naturally explain why the excess
only shows up in the form of two hadron jets. Although the required production
cross section and mass put constraints on model parameters and rule out some
possible scenarios when confronted with other existing data, in particular FCNC
data, we find that there are strong constraints on the Yukawa couplings of
these scalars. Without forcing the couplings to be some special texture forms
most of the scalars, except the $({\bf 3}, {\bf 3}, -1/3)$, are in trouble with
FCNC data. We also study some features for search of these new particles at the
RHIC and the LHC and find that related information can help further to
distinguish different models.
