You can find a wide range of hair products out in the market that are made especially for color-treated hair. The most important ingredient of those products is silicones, which is used to preserve the color for a long time. In addition to that, before purchasing hair products make sure that your selected items are free of sulfates. Sulfates are very powerful chemical and can remove hair dye. And if your hair color is already in a stage where they are fading, try using a color-deposing shampoo.
Do not heat your Hair
Colored hair should be kept away from heat. Girls usually use blow dryer to make different hairstyle and they also iron their hair. However, in case of colored hair, you cannot afford to do that. Heat can fade your hair color and you cannot heat your hair.
Save your hair from direct sunlight
UV light can damage your hair to great extent. So you need to use such hair products that have UV filters if you want to preserve your hair color.