I left this same review for the black, however, the purple had the exact same issue except it only got to light pink. The only reason I'm giving this one two stars is it at least showed pigment when first used.
This color, amongst the other I tried to use (purple) did not work in cold processed soap. We used an olive/coconut oil base. This was less than a pound to make room for lye and water. We used less than the recommended at first. Absolutely no color distribution. We then added another 5 drops. No color distribution. We mixed and mixed and mixed and ended up with this extremely light gray. We added a few more drops and ended up with a darker gray. I'm sure it will darken to a black over time, however, I've never seen so much needing to be used to see a true-to-color response in the batches. We used a total of 16 drops to just get to the dark gray. The soap was traced so heavy it was impossible to pour. This was a little annoying considering something like mica powder shows a brilliant, true-to-color result. You would think with liquid drops it would be even easier. However, considering the purple came out light pink with over 10 drops, I'm not too thrilled with my purchases, especially since I bought multiple colors in the 1oz containers. Will not buy these again and I recommend turning to mica powders or dioxides.