I am irked that the WINUI 3 ColorPicker is so complex and not easy to use in C# code.
I would much prefer a more straightforward implementation such as provided by this project, although I do realize that a new implementation would require creating a Handler rather than a custom Renderer.
One desirable feature enhancement would be to allow specification of, and the display of,a hex value, e.g. #rrggbbaa
with alpha, or #rrggbb without alpha (would default to 100%)