Founder here. Happy to answer any questions you people might have. We built this tool for developers and designers who want to find great gradient colors from a single color. A random forest algorithm is used to find the best possible colors for you based on thousands of candidates. We'd love for everyone to give it a try.
Nice. How does measure fitness?
We initially labeled a small sample of gradient colors which we bootstrapped to create our initial classifier. We did a few tuning iterations until the product was ready.
Can you please explain more how this works? Why gradients, is this even a problem in design? Is finding a style guide not more important?