It definitely came out brighter than I was expecting, so hopefully it'll be ok. I don't have to have it perfect on Monday since I won't be actually working yet, so I'm not too worried. I really like it though! I used the anti-ageing dye in 4 and mixed it with a Vol 30 developer and Ion's Hot Red Intensifier.
The picture below is what I showed him to ask if it would be ok and he said it was fine. I think they're close enough? I guess I'll find out on Monday!