I hennaed my hair last month and i hated it. I dyed my hair two weeks ago with l'oreal superior preference in a dark brown colour and I love it. It covered the henna and it hasnt faded yet. Its only been two weeks but it hasn't faded at all. I'm leaving my hair alone now to let my natural colour grown out but the colour i choose matches my natural colour pretty good so I hope i dont have that much of a grow out line.