Abhibhayatanasutta 5.1

5.1

Ajjhattaṃ arūpasaññī eko bahiddhā rūpāni passati nīlāni nīlavaṇṇāni nīlanidassanāni nīlanibhāsāni.

Not perceiving form internally, someone sees forms externally, blue, with blue color and blue appearance.