I was a little hesitant on passing this because I wasn't too sure if the custom skincolor rule applied to palettes but I decided to pass it on through because there is another singular palette mod already released. If you do make more palettes however, what I would suggest is updating this release thread to have your own collection of palettes.
Another thing I would like to say is that some of the colors are so hard to see, especially the whites, greys, and blacks when running of software but OpenGL does not have this problem. Especially in levels such as Techno Legacy and Deep Sea Act 2. Maybe update those color groups a little more in a further release if you plan on doing so? Other than that, welcome to releases!