Shampoo to tint grey hair

[Gofastboatsmojito]

Hi, I'm brown haired, getting some highlights to help blend in the ever increasing greys. I thought a shampoo to help blend them in and keep me good between hairdresser appointments night be a good idea but the shampoos seem to be for brunette or red hair.

Can anyone recommended one better suited to dark blond?

Thanks

Olaplex the purple one is good - pricey though, I only use about a small amount, size of a pound coin. I use it after my regular shampoo simply for its colouring effect.

Superdrug do some wash in/ wash out
Colour effects (£3 but often on offer ) or Shine Drops (that you add to conditioner )

I used Bold Uniq last week it does brighten the grey hairs but it's quite drying . - it's one of the blue shampoos
I tried Bleach London Silver before this , again, a bit drying