I'm actually surprised to see such negative reviews on this color of liquid dye. I have achieved very light grey to black using 646 soy wax with no problems. Yes it takes a bit more to have a deeply saturated color, but nothing out of the ordinary. I will definitely continue to buy this. My only issue, as with ALL of the liquid dye containers, is that the dropper's plastic end easily erodes and you are left with a very messy situation (so wear gloves, i guess).