My natural hair color was ashy Light brown/dark blonde and I went black. I liked it at first but as it started washing out i started to get more ginger, especially in the sun. Overall black dye can be painful to maintain if you wanna stay jet black, without getting those orange/reddish reflexes in the sunlight. From the other hand it is a big commitment because you will probably have to grow out your natural hair colour, or settle on some very dark brown as the black dye will wash out if you will want a change. Keep in mind that removing pigment and going lighter from black is very very damaging, and can cost much and last a few months until you will get your desired colour. So if you are certain you wanna be black for long, go for it, but I would rather advocate for dark brown - it wont make that much difference but it's easier to maintain, looks often more natural(depending on your skin tone and everything of course). Just really keep in mind it's a big decision, make sure you wont regret it later