What should I use?

[Megansull1]

I have base 6 L’Oréal majirel at my roots and then bleach blonde ends. I would love to go back to my natural copper something between a 7.4 and 7.43. I understand I have to bleach my roots but what should I use to get this colour as I don’t want it to bounce off the blonde? Majirel only please xx