Select the format in which you wish to copy to your clipboard with the selector at the top.
Click the colour (when your cursor is a crosshair) you want to copy and it will be added to your clipboard in the chosen format.
If you are having issues, please tweet it to me and I will respond as fast as I can @koya_io.
Please be aware there are issues with Safari - Clipboard.js does not work and the error catchment fails, I am also unable to test on Safari past version 5.1.7; use this tool in Chrome for perfect performance.
This site was made by @koya_io and I am open to new colour suggestions and you can add a comment onto the reddit thread.