diluvianjellyfish The best way is the cheapest. Let your hair get really dirty before you bleach it. Like 3 days minimum. Buy a violet colour with a blue undertone, like purple haze by manic panic. Get dove intense therapy conditioner. This is essential. Its the best for bleached hair, and dyes mix better with the thickest conditioner. Mix an 80% cconditoner ratio to a 15-20% dye ratio. Stir until a lovely what I call "smooth purple". Slap it on. It starts taking effect within the first few minutes, which makes it easier to judge colour by time. Doing it this way also gives an oportunity to experiment with the colour. I do my conditioner dye mix while I'm in the shower with wet hair. The longer I leave it or more often I apply, the darker it gets in spots for a little while. Good luck, and have fun!