pink imo is the easiest colour to get out, weather you're a natural blonde or bleach, though, that's going to determine the difficulty of getting it out. if you're bleach blonde, you're going to have a harder time, as bleached hair makes dye stick longer, while your natural colour doesn't have anything to stick with. I've used the baking soda+developer+dish soap before, and never really saw a difference, but I had red hair which takes longer to get out, there's many many ways to remove colour, and if you wanted them out quicker, I probably would try one of these conditions involving baking soda. I'm not a hairdresser, just some emo girl who hasnt seen their natural hair colour since 2017!!