Right now I’m getting around this topic as follows.
After creating my model in vectorworks and separating each object by class.
I select class by class and change the color example:
Class 01:
A: 255
G: 255
B: 255
Class 02:
A: 254
G: 255
B: 255
Class 03:
A: 253
G: 255
B: 255
…
This way, when exporting each item, it is possible to modify the texture individually.