def darken(self, amount=51, region=None):
        self.tint(-amount, -amount, -amount, region)
Record constant data.
dataset/ETHPy150Open asweigart/pygcurse/pygcurse/__init__.py/PygcurseSurface.darken--crossover with--dataset/ETHPy150Open OpenMDAO/OpenMDAO-Framework/openmdao.lib/src/openmdao/lib/casehandlers/hdf5case.py/HDF5CaseRecorder.record_constants