Definition of twilight:
the soft light in the sky seen before the rising and (especially) after the setting of the sun, occasioned by the illumination of the earth's atmosphere by the direct rays of the sun and their reflection on the earth; the time when this light is visible; the period between daylight and darkness
"I could just make out her face in the twilight."
pertaining to or resembling twilight
"o'er the twilight groves and dusky caves. --Pope."