One time I was in an elevator with my friend and my neighbor. Coincidentally, my neighbor was wearing the same day-glo yellow nail color as me, so my friend awkwardly pointed and remarked, "Look! Same polish!" I blushed a little and nodded to acknowledge our mutual good taste and later chided my friend for talking to my neighbor (my visitors should be as unfriendly as I am). Apparently this is the same premise (sort of) of an old Sarah Silverman sketch. Anyway, to me, yellow is unspoken coolness—no need to discuss.