There are two color blindness liibraries for Processing.
Homepage: ColorBlindess: Processing Library | ixora.io
This is the one available through Contributions Manager if you search ColorBlindness.
Second:
Both support Daltonization.
I just found the second on accident – it was a 2017 GSOC project. I’m not sure why the project was done to create a second library, or what needs it addressed that were not addressed by the first one.