What happens next?

How to lighten naturally black coloured hair at home
Choose a warmer color for a reddish tone.
With black hair, choose a dye that's only slightly lighter than your natural hair color unless you want to lift your hair via bleaching first. Select a dye that's a lighter shade than your natural color without being radically different, such as a dark brunette shade.
Black hair has a lot of red and copper undertones. If you want an auburn hair color, select a reddish brown.