Sri Matre Namaha
Nīlacikurā – The One Hundred & Eighty Fifth name in Lalitha Sahasranamam.
nilah cikurah (kuntalah) yasyah sa
Whose locks of hair are blue
Nila means indigo colour. Chikura means hair of the head or tuft of hair. She has indigo coloured hair. This meaning seems to be inappropriate here. A proper interpretation of this nama seems to be difficult. This nama is out of context, when Vak Devis are mentioning about the effects of worshipping Her nirguna Brahman form. At the same time these Vak Devis would not have placed this nama here without knowing its significance. Some are of the opinion that Vak Devis while concentrating on the effects of worshipping Her formless form, realised like a flash the beauty of Her hair and this is the reason for placing the nama here. The possible interpretation could be: The head is covered by hair (chikura) in all the human beings. Ajna chakra is associated with indigo colour (nila).
Nila-chikura could mean the back head chakra, situated just behind ajna chakra in the back of the head (above medulla oblongata) that is fully covered by hair. Priests have their tuft in the back head chakra. When back head chakra is well developed, you can see anything happening in the world. It also helps in establishing commune with God. This chakra is considered to be highly secretive in nature. Some are of the opinion that tuft is kept here in order to prevent others from seeing this place. The area in which this chakra is located protrudes predominantly, when fully activated (chikura also means a mountain, possibly indicating this protrusion). This chakra also receives divine energy.
In other words, by developing nila-chikura (back head chakra), you can realize Her formless form in the form of light that is indigo in colour. This interpretation perfectly fits into this place.