This look interesting. I am wondering if your approach employs complementary colors. If so, do you use the RGB color wheel, or RYB? I believe that the later makes more sense, but the former seems to be the default in similar work.
Although the library is not a color generator per se, it has one built-in palette generator (color mapping function), which is tonal/monochromatic--chosen as default because it's the most common palette type used by popular design systems like Material Design. You can use third-party libraries to aid writing any additional color mapping function you want to implement. (I can also include additional color mappings based on feedback.)
Ultimately, what simpler-color provides is a well-defined structure for your custom color system that works well with various color-generator libraries.