Hello @EpicCargo ,
Currently system provides an option of 4 color themes to choose from. This is based on characteristics of wallpaper that is being used. If a similar wallpaper is used, it may show same 4 colors again. Multiple members have suggested a color wheel being used which we have passed on to our usability team for review.
One UI Beta Team
I know we can make theme colors in Theme Park, and sometimes the choices are a little overwhelming. Even though I love customization, sometimes my mind just wants a few choices so I'm not wasting time picking colors.
That being said, the current 4 choice layout is similar to the Google Material You. Having a bit more leeway as a 5th option would be great, ans if you haven't had your coffee yet you can just use one of the default choices. Haha