I always have a problem with buying foundations that are too dark, my skin is so pale that even the lightest ones of most collections aren't light enough! I recently ran out of my favourite foundation and didn't have the funds to purchase a new one. However I did find a foundation in my makeup drawers that is too dark for me, here is what I did:
I remembered a YouTube video that I watched ages ago where foundation was mixed with moisturiser.. I tried it and it works! I wouldn't recommend this for someone who likes full coverage as it basically becomes a tinted moisturiser. The more moisturiser you mix in, the thinner the foundation gets therefore its up to you how much you use. An advantage of doing this is that my skin looks really healthy and the right amount of dewy, I am so glad that I discovered this.
Have you done this technique before?