If you frequently color your hair at home, you’re probably all too aware of the unpredictability of DIY hair dye. Sometimes it comes out too dark, sometimes it’s too light and sometimes it’s a completely different shade (like orange!) than you intended it to be. To achieve a shade that’s just right, practice makes perfect, but there are things you can do to prevent hair color from coming out too dark and to fix it if it happens. Here, George Papanikolas, Matrix celebrity colorist, shares the biggest mistakes he sees people make — and how to avoid or remedy them.DIY Tip 1: You Picked the Wrong ColorThere are many factors that can contribute to your hair color coming out too dark, but the most probable cause is the box color you selected. “Most likely, you picked a darker color than you desired,” says Papanikolas. “For example, people might think they have black hair, but really they have medium brown hair. On the color spectrum chart, there are ten shades — level one black to level ten pale blonde. Levels one to six are all brunette shades, so picking the right color can be tricky when you aren't a professional.” Luckily, there are several apps and websites that can help you select the right shade at home, including the Garnier Shade Selector Tool and the L’Oréal Paris Hair Color Concierge. DIY Tip 2: You Need to Hone Your Application Technique“The second most likely factor is that you applied the same color from roots to ends,” says Papanikolas. This is the wrong approach, especially if you are using permanent color. “Because the ends are more porous and have more color buildup, they can suck up more color and become inky and dark.”