Shampoo-type hair dye recommendation for when you're feeling lazy

Going to the salon is quite expensive, and regular hair dye is a hassle. So, I came up with the idea of ​​a shampoo-type hair dye. The instructions were incredibly simple. You just squeeze all three packets onto your hand at once, rub them together vigorously, and massage them in just like you're washing your hair. It's a total game changer. The color develops nicely and subtly. The only downside is that it returns to its original state after about two weeks...