I had to add another 2 cents.... In my humble opinion, some African-American women still are caught up in color. I know a few women that REFUSE to be that close to the end of the color spectrum, so they end up with foundation that is too light. Instead of embracing their color, they will say that they are NC 45 to appear that they are lighter when in actuality, they are clearly NW50.
Clearly... Tish and Serena are not very close on the color spectrum... Tish is much cooler toned than Serena and appears to be more of a true NC45. It just sounds like denial and self-hate to me. I could be reading way too much into this....(Tish sorry to use you as an example, but you posted such a great picture.)