Taupe fans unite! Here's a comparison I did of a bunch of taupe eyeshadows I've owned at some point in time. The only taupes I use now are Urban Decay Shakedown (a dupe of the hard-to-find Mac "French Grey" swatched below) and NARS Ashes to Ashes pictured here. Those colors seem to make my blue-green eyes stand out best. Outdoors, Wet n' Wild Nutty looks quite warm against my fair, cool skintone.
Swatches of Wet n' Wild "Nutty", Mac "Style Snob," Laura Mercier "Topez," Chanel "Safari," Nars "Ashes to Ashes," Mac "French Grey," and Stila "Cloud" against NW15 skin in direct sunlight: