I had my hair highlighted at the salon, but it turned yellow despite using silver shampoo. I used 8-11 light blonde for about 20 minutes and I'm happy with the result. I wished for a slightly cooler tone, but given the starting point, I'm satisfied! 🥰
You could try Maria Nila's color bomb "cool cream", it has a more greenish/ashy tone that neutralizes dark copper shades and orange tones on blonde hair in darkness level between 7-9, it gives a very ashy and cool result that looks really nice in highlights without darkening too much 🥰
The difference between this and a silver shampoo/silver mask is that it not only neutralizes yellow tones but also light orange (which I think you have). For an extra intense result the first time, you can apply the mask to dry hair or slightly damp hair and let it sit longer 🥰