For Fairer Feet :)

Try creating several solid black circles on an off white surface. You will notice that a contrast is set between the two opposing colors, and as the dark colored circles are highlighted, the light colored surface is all the more washed out.

I believe that the same principle holds true for the FEET and its colored TOENAILS :) I have tried using light colored polish (colorless, light pink, peach, etc) as well as dark colored ones (black, deep violet, midnight red etc) on my toenails but my observation is that as always, whenever I use the darker shades, my feet would always appear to be fairer and cleaner to look at.

Try and see for yourself :)