What kind of experience is it to dye your hair blue?

It's cool just after dyeing, because when you go out, you will see many people looking at you and think you are the most beautiful boy in the whole street, but there are also shortcomings, that is, it won't last long, and you will be handsome in about a week, or the bleached color is a bit like rotten grass, but I want to dye another color, and now my hair is tossed like grass.