dark adaptation; dark ages; dark blue; dark bread; dark chocolate; dark comedy; dark field illumination; dark glasses; dark ground illumination; dark horse; dark lantern; dark matter; dark meat; dark red; dark-blue; dark-brown; dark-coated; dark-colored; dark-coloured; dark-eyed junco; dark-field microscope; dark-fruited; dark-gray; dark-green; dark-grey; dark-haired; dark-skinned; dark-spotted;