Melt the argan oil, shea butter, and vegetable-based emulsifying wax in a medium saucepan or double boiler. Stir frequently to prevent scorching.
Stir in the witch hazel and aloe vera gel. Whisking will help fully blend the new ingredients into the mixture in the pot.
Turn off the stove burner.
Add in the Bentonite clay and stir.
Mix in your coloring ingredients just a single pinch at a time to avoid using too much, and getting the mixture too dark for your skin tone.
Once the mixture is cool enough to touch, test the color of the natural liquid foundation on the inside of your upper arm. If it is too light, stir in more coloring ingredients just a little bit at a time and test again. If it is too dark, the only thing you can do is dump the pot and start over.