Hi Alma,
Thank you for your question!
The brand has designed the product images so that the desired result is achieved when the starting hair color is white ☺️
If there is already a color in the hair, this will also affect the color result. The porosity, condition, and quality of the hair can also influence the outcome!
However, this is a darker shade, so generally, the starting hair color (if it is light) does not affect as strongly as with pastel shades 😊
Unfortunately, I can't say more precisely what the result would be on your hair!
I recommend that you first try the color on a small section of your hair to see if the result matches the desired shade!
I hope this was helpful. Sunny Friday 💛🌞