What colour would it go?

LaylaMay

My hair is a faded red-ish brown colour currently from dying it previously and my mother bought me a blue black hair dye colour today. What colour would it go once I dye it? Would it be a red black colour or a blue black colour? Or something else entirely?

I’m going to dye it tonight either way but I’m just curious what it would look like

^this is the colour it is Rn