So, in order to get your perfect color, you’ll have to determine where your current hair color lies in the stages of lightening. Then, make sure to check the dye you plan on using. There are usually directions, especially on semi-permanent dyes on what stage you’re recommended to start at. This will ensure you get the best color based on what you want it to look like. But, as an easy rule of thumb, for darker colors that will act as a tint, you can start at a level 3 and higher.