The black magic technique doesn't just have to be on very dark coloured card. It works well on lighter colours too as this sample shows.
For this card I stamped in black on a kraft card mat several times. I then took a blender pen and filled in the areas that I wanted to add colour to with Stampin Up craft whisper white ink. This ink is a pigment ink and takes time to dry so either dry with a blast from a heat tool or wait awhile for it to dry thoroughly.
Once dry I took my blender pen and used various shades of Stampin Up classic inks to colour the areas that I had suited out.
I love the look this technique supplies on kraft card and I hope you do too. 😊