Tanning tips/recommendations for "old" white legs!

I've bought a really nice dress which is described as midi. I would have liked it slightly longer but hey ho. I have very white/bluey legs (not my best feature). I'm going to need to put something on them so that they don't look so pale. So many different products in Boots that I'm totally confused. Has anyone got any recommendations that are easy to apply and cover up mistakes please. Quite happy with "wash off".