Birkenstock Sandals

I'll get the classic Birkenstock sandals two belt, but I was wondering what color seems to be more in style right now, tan or mocha. also, I want a color that will be cute, but practical, because I am them to Europe for two weeks vacation. Thank you!

Birkenstocks are really out of style, no offense. But they are practical and casual so it whatsoever. I say tan.