Looking for feedback!

I'm working on a web app for making accessible color palettes. Try it on https://inclusivecolors.com! You get precise control of the hue/saturation/lightness curves of each swatch, and you can check the WCAG contrast of any color pairing.

I'd love to get some feedback from beginners and experts about what they're looking for when they design color palettes for their projects.

This is my own work, including the app idea, the UI, and the UX.