It is a major no no to wear hose with open toe shoes these days. Just look inside the pages of Stlye Magazine, Vogue etc. No one wears hose with open toe shoes!!!
The best thing to do is to first g o buy a good self tanner and go faux tan those good ole white legs. Do it very lightly if you plan not to do the the rest of your body, just enough to give your legs a warm glow. Have you ever applied a self tanner? When you get to the foot area, it is best to apply the tanner around the toes and side foot area with a make-up sponge, applying just a very small amount. Next go and get a great pedicure, with a polish complimentary to your dress.
Any major department store sells the toeless hose. These don't work with, or look good with really strappy, totally open shoes. However, if the shoe is just open in the front, then you may be able to use these. I used them for a pair of shoes and dress I wore when we were in Monaco last year, and they worked great.
Personally, any time I can get away not wearing hose. I go for it. They are the most evil article of clothing ever created.