If you have dark hair, you can go to a different color that's the same value, such as dark brown to dark red. It is not possible to go from dark brown to blonde without using some sort of bleach, be it a bleaching kit or peroxide. You can try to use a product that already has bleach or peroxide in it, but be aware that it may only lighten your hair to a certain degree. It is impossible. Even blonds need to bleach and tone their hair. Part of your hair color will always shine through. For example, if you try to dye blonde hair blue, you will end up with green hair. Because your hair is so dark, whatever color you dye your hair will end up darker that what's on the box. If you have dark brown hair and try to dye it red, you will most likely get dark red instead. There are different hair types, with varying levels of texture and porosity. All of this can affect how well the hair can take dye. For example, Asian hair is difficult to dye because the cuticle layer is so strong. African hair is also tricky to dye because of how fragile and prone to damage it is. Even if your best friend has the exact same hair color as you, there is no guarantee that the same dye that worked on her hair will also work on yours.
اعلمي أن تفتيح شعرك دون تشقيره ليس ممكنًا. انسي أمر صبغ شعرك بألوان الباستيل دون صبغة تشقير. تذكري أن صبغة الشعر شفافة. اعلمي أن بعض أنواع الشعر تلتقط الصبغة أفضل من غيرها وفقًا لقوام الشعر.