Chakra Colours

I got a question

Some books I read say the follow colours

third eye is: violet
crown is: white

and others say

third eye is: deep blue
crown is: violet

Which colours are they really? And why the differnce between books.

[Liet]

The Pituitary gland is blue(not cyan), its the "body" to the indigo foreheads "surface"... surfaces obscure bodies if equal.
The less crystalized they are, the darker they appear.

The crowns color is a combination of indigo and soft pink, aka violet... but it rapidly turns colorless as it crystalizes (as opposed to the first energy, it stays black as its incapable of crystalizing even slightly; only quantity matter for its effect).