  We factorize the infrared divergences of the non-forward BFKL Green function
for a general t-channel projection of the color quantum numbers and study the
properties of the infrared finite remainder in the case of color octet
exchange. The octet Green function is compared with the singlet case for
different values of the momentum transfer. The octet Green function plays an
important role in the calculation of the finite remainder of the two-loop
six-point MHV planar amplitude in N = 4 SYM as it was demonstrated by Bartels,
Lipatov and one of us in http://arXiv.org/abs/arXiv:0802.2065 and
http://arXiv.org/abs/arXiv:0807.0894. A comparison with regularizations
preserving conformal invariance at large momentum transfer is shown.
