I'm a developer trying to learn more and practice better graphic design. One of the tools I love to use is Shaun Chapman's http://0to255.com as it easily let's you pick good variations on a base color for use in highlights, borders, etc.
I've always been interested in how the range of colors that is output is created. From the about page on 0to255.com:
Simply pick the color that you want to start with and 0to255 gives you a range of colors from black to white using an interval optimized for web design.
Can anybody give me a clue what this interval would be or some guidelines? I'd love to know just for personal growth how these are calculated so I can get some practice picking good color variations manually instead of relying on a tool that I don't quite understand the inner workings of.