Black would, at least in my humble opinion, be a very close second choice to "resale" red. Nicely done black cars just have their own special look. My first exposure to a K code was a very fast ride in a black on black 66 fastback back when I was a freshman in high school and I never forgot that ride or that car, it was what fueled my desire to someday own a K. I was 14 then and it only took me around 28 more years to finally get my own K. Sad ending to that black K by the way,as it ended up meeting a telephone pole at high speed a few years later.
Jack