--> Teal Hair.
I just put teal in my hair but it's not as bright as I would like and also doesn't last very long. What brand dye do you recommend?

All dyes differ for different people, my only advice is apply to dry hair and wash it with cold water/not very often. It’s very hard to keep, I dye mine once every 2 weeks so I have one week of it bright and one week of it faded.
There is some dyes I think are promising but I haven’t tried personally and that’s Pravana Vivids.