if i have black and i use the purple semi permanent dye, will it show at all and is there any way i...

Q: if i have black and i use the purple semi permanent dye, will it show at all and is there any way i can make it brighter apart from bleaching it?

A strand test is the best way to check out the colour without a full head application. The semi on black hair may give it a slight hint of colour but you are not going to get the vibrant purple colour. 

You can find the liquid hair chalk in Woolworths at the moment that will give instant vibrant colour on dark hair. 

Happy colouring.