I have an iPhone 6, and when messing around in the settings, I made my backround picture dark. Help?

I know how to adjust the screen brightness, but its something in the settings I messed with. I already tried reducing the contrast, but it didnt help.

I know how to adjust the screen brightness, but it's something in the settings I messed with. I already tried reducing the contrast, but it didn't help. I don't know what to change

or:I know how to adjust the screen brightness, but it's something in the settings I messed with. I already tried reducing the contrast, but it didn't help. I don't know what to change

Tags:dark,contrast,