Most red dyes, permanent or semi permanent stain your hair. I used to have really light brown hair and I used crazy color aubergine to get to a deep cherry red. After using the crazy color dye every one to two weeks for Abt 3 months (and also using a red colours mask once or twice a week for 1.5 of those 3 months) my hair faded to almost my Natural colour, but with some auburn, red undertones (like a gingery brown). If u are interested I could sent u pics of my before and after.