I had to resurrect this post. I tried my olive oil infused with calendula and it made a nice, though somewhat muted yellow. I was so pleased when it came out of the mold!! However, its cure time is not even completed and it has faded to a greyish white. I'm so disappointed. The best of the photos shows calendula flowers added at trace. I'm not sure I want to do that, but I guess that is the only way to keep the color.
I've tried Alkanet but used too much and that soap is really dark. I've been making curls and adding it to other soap. I tried some grated, but the color bled into the surrounding soap, so I guess I'll stick to the curls. I gave that whole batch to the storm relief. From what I have read, if you do not use enough alkanet, the soap turns a greyish color.
I've also tried parsley and rather like the green flecks in peppermint soap. My attempt at tumeric was dismal, but I do not think I added enough. I guess another tumeric and a paprika will be my next experiments. Any other ideas/suggestions?