Display related colors in color selector editor window

### Description of the new feature / enhancement

[This Canva tool](https://www.canva.com/colors/color-wheel/) allows you to explore alternative colors to the one you select. The user can choose whether to see the complementary color, a monochromatic palette, and more.

I think it would be a nice addition to the color selector editor window if you could select among some of these options so that it would show the variants where it now shows monochromatic alternatives (I guess it could be the default?). Specially the 'Complementary' variant seems useful for me.

I added quick core concept of the addition in the "Supporting information" section.

### Scenario when this would be used?

This would be used when deciding for a palette of colors at design time when working on a frontend project, creating some kind of presentation where you want to transmit more with the colors, or even just to feed the pure curiosity of someone interested (or to be so) in color theory.

### Supporting information

Again, here's the Canva page where you can play with this idea: https://www.canva.com/colors/color-wheel/

And here's the quick sketch of what I had in mind

No files, tests, or code entry points are named. Start by locating the color selector editor window and reviewing how its current monochromatic alternatives are generated; done means users can choose the proposed color variants, including complementary colors, in that window.

Written by the indexing model from the issue text.