[1] If you've dyed your hair and your new hair color has turned out too dark, there are ways to correct the problem with minimal damage and lighten colored hair to the shade you actually want. The technique you use will depend on how dark your hair is, as well as how quickly you want to correct it, and whether your hair is in good condition or not. Why does hair color end up too dark? There are a few major reasons why hair color can end up darker than expected, and these relate to the condition of your hair and how the dye was applied: Porosity Shade selection Brand differences Development time The porosity of your hair is the most common cause of hair dye that turns out too dark. When hair is porous, it soaks up dye more readily and this can lead to it becoming much darker than it should. Sometimes, this high porosity will be natural, whilst most of the time it is caused by damage to the surface of the hair shaft. When hair is damaged, the cuticles on the s