Adbhutasagara 48.255

48.255

śvādīnāṃ pañcapañcānāṃ chāyā vividhalakṣaṇā|
nābhasī nirmalā nīlā sasnehā nirmaleva ca||

The shadow of the five [elements] has various characteristics: / atmospheric shadow is pure, dark-blue, lustrous, and as if spotless;