Leader according to tests!

Cool shade
Dark Сhocolate 206

Cool shade.
Dark chocolate color with green base.
Free from red color.
It is not very dense, so denser Petra 416 may be added for fixing.
2 tones lighter than Chestnut 207, the next in palette.
A tone darker and cooler than Coffee 209.
It is optimal for warm black-haired women, for oily skin with pores, ashy shades may be got on cool skin.
Dark chocolate color with green base.
Free from red color.
It is not very dense, so denser Petra 416 may be added for fixing.
2 tones lighter than Chestnut 207, the next in palette.
A tone darker and cooler than Coffee 209.
It is optimal for warm black-haired women, for oily skin with pores, ashy shades may be got on cool skin.