I dyed my hair from a box Really light blonde (it looks bleached) what color box dye do I put over it to make it darken?

It depends on how long ago you did it because if you do try to darken it too soon your hair mite go green or red or pink I think you should go to asalon to get it fixed hun just in case and if they mess it up they will have to fix it for free

If your hair came out too light, it can be toned down by using a hair color that's 1-2 shade darker than your current color. Be sure to choose neutral base hair color. It will give you a warm balance and prevent unwanted hues in your hair. Have a professional or someone that has experience in hair coloring do the coloring process for you.