If you have a very dark coloured oil, like sea buckthorn or unrefined hemp seed oil, test it out on your skin for a few days in the same spot before using it. Some paler skinned people might go a little orange when using these dark oils, and testing it before adding it to that wonderful creation may save you from looking like you abused the self-tanner!
Dark coloured oils will impact the colour of your product. When I made my first intense hair conditioner with sea buckthorn oil, we called it hair custard because it was so yellow! The colour had no impact on my hair, but it's something to think about!
And check out Ana's eye gel with cera bellina when you get a chance. It sounds so decadent!