There is in fact seven species of titi monkey currently in occurring in Colombia.
The coppery titi monkey Callicebus cupreus, the ornate titi monkey (C. ornatus) in the sub-genus cupreus. To make matters more complex there is second sub-genus torquatus with 4 candidate species: black titi monkey (Callicebus lugens), collared titi monkey (Callicebus torquatus), Colombian black-handed titi monkey (Callicebus medemi) and the Lucifer titi monkey (Callicebus lucifer).
Thank you for the information, but I would rather go with the Callicebus lucifer...
note that the indivudual has the white patch in the throat, just as the lucifer ones.