  Hot electron temperatures and electron energy spectra in the course of
interaction between intense laser pulse and overdense plasmas are reexamined
from a viewpoint of the difference in laser wavelength. The hot electron
temperature measured by a particle-in-cell simulation is scaled by $I$ rather
than $I \lambda^2$ at the interaction with overdense plasmas with fixed ions,
where $I$ and $\lambda$ are the laser intensity and wavelength, respectively.
