Colorgorical is an advanced color scheme generator, what I like about this is
- gives you a choice of the number of colors up to 20
- gives the colors as RGB, Hex and a few others
- all of the color codes can be copied as a text string
- shows you a few examples of all of the colors used near each other
- can select lightness range, not too dark, not too light.
- keeps a history of results so you can compare several of them on a single screen together
- is based on research (paper)
- open source at GitHub
The one thing it is missing is an option for color blindness. It should choose colors that can be seen by people with different color blindness.