Ms Fowler was kind enough to match me to a foundation shade herself, and picked out Leisha. A swatch to show the colour is below. Leisha is a fair, neutral shade, and is the second lightest shade in the liquid foundation. The shades are named after the actresses on The L Word, and an image search for the 'actress name + The L Word' is actually quite a good way to narrow down the correct colour choice for you.
The only caution I'd give with this foundation is that the light reflective particles can give a tiny sparkle under bright artificial lights. I've taken a picture of my blended hand swatch using flash, and you can just see the scattered sparkles
Disclosure: PR sample.