Coleure was a color picker that focused on a few aspects that I didn’t see in other tools at the time.
You didn’t start from scratch. I drew inspiration from a PANTONE sampler and included hundreds of colors to start from, so it felt like exploring a store of time-tested colors.
You could play with colors. There was a mix tool that allowed you to choose a color in between other colors and get new results (as if it was paint).
You could literally play with colors. I included a HTML/CSS previewer in which you could use colors in your different palettes and cycle through them to find one that worked for your project.
Coleure would also tell you if the color you had had enough contrast against black, white, or another color. Most color pickers now have this functionality.