These body washes are one of the reasons to give your products time. These are the same uncoloured body wash with one small difference - the fragrance oil. The one on the left contains Yuzu fragrance oil, the one on the right contains Sweet Meyer Lemon (both from Brambleberry). The one on the left is the original colour, but cloudy. The colour change was obvious on day two, but a few weeks later, it's really really pink (and very nice, I might add).
Vanilla can really discolour our products, hence the need for non-discolouring vanilla or vanilla stabilizer. I make really lovely bath bomb cupcakes (original recipe by Anne-Marie of the Soap Queen blog), but they can get a horrible brown ring under the icing if I use vanilla or vanilla based fragrance oils. Using some stabilizer with something that might contain vanilla - for instance, Cream Cheese Frosting or Clementine Cupcake - means we won't get that horrible brown ring! Vanilla can colour your lotions, too. If you see something with a slightly brown tone, you've probably used something with vanilla. Don't worry - the product is fine, it's just a bit beige.
Related posts about fragrances:
Surfactants and fragrances: Clarity
Surfactants and fragrances: Viscosity
Give it time
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