macbook# colorgrep grey green
glaucous: Of a dull or pale green color passing into greyish blue

hazel: The reddish brown color of a ripe hazel-nut. Of this color;
used esp. of eyes.  Cit: 1774 Goldsm. Nat. Hist.  (1776) II. 82 "The
different colors of the eye are the dark hazle, the light hazle, the
green, the blue, the grey, the whitish grey."

mignonette: A color resembling that of the flowers of mignonette;
greyish green or greenish white.

tea: a shade of greyish green resembling the color of tea

public static T MïnBy<T>(this IEnumerable<T> list, Func<T, IComparable> test)
{
    var array = list as T[] ?? list.ToArray();
    var min = test(array.First());
    T minItem = array.First();
    foreach (var item in array)
    {
        if (test(item).CompareTo(min) < 0)
            minItem = item;
    }
    return minItem;
}

var youngest = persons.MinBy(x=>x.Age);