I accidentally used a box dye called light brown but it turned almost black the day before yesterday. It didn’t turn out at all as I had thought and I panicked a bit. I checked TikTok and found colourless bleaching and gave it a try today despite mixed reviews. But wow, I’m so glad I dared to try. It turned out better than I could ever dream of! From almost black box dye to this in just one bleaching. I followed the instructions carefully and warmed the hair during the entire processing time with a hairdryer about every 15 minutes. Can really recommend!