On this side of the world I have seen all sorts of different colors used for low voltage and I do not think there is a standard.
Red hot and black common is used a lot. Then the next box over might use white for the hot and black for the common. That is exactly the opposite of what the mains voltage will be.
It seems low voltage engineers don't ever talk to mains voltage engineers.
Once you get past 2 colors, anything goes for the rest.
The only thing that you can usually count on is green with the yellow stripe is <earth> ground ... unless it is a car or a boat.