How do i make my natural red hair brighter? and shampoo sugs?

a while back i died my hair brown. loved it at first. stupidest thiing i've ever done in my life. my hair is pretty muchh alllllll red now, but is there anything i can do to make it appear redder?brighter? and good shampoos?How do i make my natural red hair brighter? and shampoo sugs?
You can apply henna to make it brighter.

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