Darkness
In darkness, creatures without darkvision effectively have the blinded condition (see page 273). Areas of darkness include an unlit chamber within a structure, most caverns, outside on a moonless night, or the surface of planets with distant or nonexistent stars. Unlike low-light vision and in areas of dim light, darkvision does not work exactly like normal vision in areas of darkness; rather, darkvision works only to a specified range and is in black and white.
Source
Core Rulebook pg. 261
