All right, I admit it -- Damien and Fabien (brothers, mayhap?!) were right and I was wrong. There actually were more colors in HM2.5 than were in the beta, which clearly is unacceptable. So I spent most of the day on Sunday redoing the color palette to match the one in 2.5 and have posted the updated version to the HM3 Alpha page.
The colors now are arranged in the classic cascading rainbow gradient like you'd see in most commercial image manipulation applications. I added on a few metallic colors at the end for good measure. Plus, you still have the 25 dedicated skin tone colors at the end separated out into their own rows for ease of use.
If there are colors you wanted to see but don't, let me know.