colour formulas

Hi guys! Quick question, can you use matrix SPN (coloursync demi) to add a little warmth when toning? Thinking of using this formula SPV + SPN (1:1) (Sheer pastel violet + sheer pastel neutral) ...to create a beige blonde on prelightened yellow level 9/10 hair. Her ends are slightly porus...

Hi geeks! I wondered if you guys could help me? I’m planning a photo shoot and I’m really drawn to metallics. I’ve been googling formulas and I’ve not been very successful! Do you guys have any Wella formulas that I could try out? I’ve attached two pictures to give an idea of what I mean but...