Phayre's? - Bang Pra Wildlife Breeding Centre

I think it's probably an Indochinese Silvered Langur, although the pink around the eyes is a bit unusual. It's not a Phayre's or Tenasserim or Grey Langur though.

They looked to me most similar to that langur at Dusit, although not quite the same.

That is a germain's langur [Trachypithecus germaini]
The pink coloration around they eyes is seen in some individuals [Look at this photo of a langur from the songkhla zoo]
https://songkhla.zoothailand.org/en/animal_view.php?detail_id=188&c_id=#prettyPhoto/0/
I dont know if its beacuse of variation in age, or if its a characteristic of a subspecies. [ this species has 2 subspecies, T.G.Germaini and T.G.Caudatus]

@Tapirus Lar - Germain's Langur is just another name for Indochinese Silvered Langur.

@Chlidonias
I know that, I don't mean to dispute your claim or something, your initial identification was correct, but i just was too lazy to use the name Indochinese Silvered Langur instead of germain's.