My hair is lightened, to a dark beigey blonde with highlights. This is the second time I've used Live rinses. The first time was pastel pink, and that barely worked. I chalked that up to my hair being too dark for a pastel.
So I tried again, with the Brights, this time Magnetic Purple. I left it in the full 30 minutes. And my highlights were the only part of my hair that took any colour, and only a pastel purple.
This product either needs far more processing time, running the risk of damaging the hair, or is only suitable for severely lightened hair.