柳暗花明 liǔ àn huā míng

liǔ àn huā míng set phrase at one's darkest hour, a glimmer of hope; light at the end of the tunnel
Domain: Idiom 成语
Notes: Literally, the willow trees make the shade, the flowers give the light (CC-CEDICT '柳暗花明'; Guoyu '柳暗花明')