The first 3 trans at the end look the same. Not enough veriety if you ask me. All the color sets that have come out just to not stand against the default colors. The only thing the default lacks is a purple (not soft) and brown trans. And a lot of the colors look pukeish.
My screen shots have never quite captured the full essence of whatever is in-game. In a dynamic environment, the first three trans on the last row do have subtle differences. And there's plenty of variety, three shades of RGB and CMY (every combination of Red, Green, and blue possible without shading and values) Both of those in varying degrees of transparency, the same set of grays as the default (essentially), four browns, three off-colors, soft RGB and CMYs, and transparent grays and browns.
What more do you want?