Paletton is a very useful for accessibility when for example you need monochromatic colours to help some people who have visual impairments navigate a website.
Here is a site (senclude.com) that I have built with someone who is visually impaired. These colours make it easier to navigate his site and tases were selected from a Paletton circle.
There are also many options to find gradients, complementary colors and change the distance between the colors in your scheme.
A highly intuitive interface makes this tool quite easy to use: You simply drag points across the interfaces surface on the left and immediately get the resulting color scheme on the right.
Click on the different colors in the preview to see their representations in hexadecimal or RGB format. In the examples section in the bottom right corner, Paletton even shows what the color scheme would look like in different contexts for example, on a website.