Is my hair safe to colour ginger after colour b4? (pics)

Hi everyone, so I've been dying my hair red for the past 6-7 months with Directions vermillion red and adore intense red, bleach bathing my roots every 6-8 weeks with 3% peroxide (I think its 10vol?) just to lift the roots enough for the red to take. Only using Directions/Adore on the lengths.

Anyway due to work related things I've been asked to dye my hair a more natural colour, and I fancy ginger, so went out and bought colour b4 and a couple of boxes of Loreal Feria in Mango (intense copper).

A bit of background on my hair: before the red my hair was a dyed medium blonde for a long time (bleached, then various toners used). I then grew my hair out for about 6 months to get a natural looking ombre (my hair is a mousey brown naturally). Then with the red, I bleach bathed my whole hair and applied the red and do a light bleach bath the regrowth every few weeks. I haven't bleached my roots for about 3 weeks.

I originally thought the colour b4 would strip out some of the red and leave me with a pink/orange base, then I was going to apply the box dye and be done with it. Although the end result of colour b4 was slightly...unexpected. It's sea green!

Would it still be ok to apply the box dye to this or will the colour go funny because of the green? I honestly didn't expect it to be this light, so I'm worried the colour might not take properly. What if I swapped out the peroxide in the box for my 10vol one to avoid lifting too much?