CrazyColor blue shock hairdye 100ml.

Ready to use conditioning semi-permanent haircolor.
Pre-lightening is advisable. The lighter the hair, the brighter the result!
Lasts for app. 8-12 washes depending on the hair quality.
Ammonia free.

From www.renbow.co.uk you can check out their color pro-program that will give you best instructions on how Crazy colors work with your own hair color.