Blond hair
Consider your options. If you have light-blond hair, you’ll do best graduating to a light brown. If you have medium- to dark-blond hair, you can darken as far as medium brown. Look for colors that complement your skin and eye color.
Remember that the color you see on the box will not be the color you come out with. In order to succeed in becoming brunet, you’ll first need to darken or fill your natural hair color with an intermediate color. This will create a base on which to build your desired color.