Hair ideas. HEEEELLLPPPP!!!!!!

R

So I died my hair red 5-6 months ago and I don’t bleach it I got it dyed with the red that would show out most and be bright since my hair is a really dark brown buuut if I dye it a lighter red would it be bright since I already have red dye in it shows a lot but it’s fading or should I dye it brown and what if I get a color lifter for the dye what color would my hair look like????

My hair is this red⬇️⬇️⬇️⬇️⬇️