I had my hair dyed a dark blond and then the botton became a nice rich brown and the top orangy brown blond. I went to a salon to get it fixed because I was getting annoyed and it was a beautiful dark brown almost black. But now after two washes it is starting to show at the top of my head the light brown blond. What do I need to do to only have one uniform color?

Buy a color care shampoo and conditoner,shampoos like head and shoulders and all those other brands just make your color fade away faster. And tell your hairstylist to keep the dye in for longer on top of your roots.