The ice in the ceiling was glowing blue anad green because the sunlight from far above was shining through the ice and lighting it all up.
천정의 얼음은 푸른 색과 초록색으로 빛나고 있었는데 맨 위로 들어오는 햇빛이 얼음을 통과해 내부를  밝혔기 때문입니다.