Palettte
Build smooth color schemes that flow from one color to another, Finetune hue, saturation value gradients of your palette and of each color swatch individually and, import, analyze and edit existing color schemes, find errors or automatically find the most similar colors from a new palette to a list of legacy colors from your codebase
Colors
Colors is a 100% data-driven collection of color palettes. After a year of curating beautiful designs over at Pixels I figured out that I could make something cool with the data and this is the result.
Colors - Beautiful and data driven color palettes
Picular
Google, but for colors
Color Leap
Take a leap through time and see the colors of history.