I recently discovered that you can skin the Chrome DevTools. So, I naturally had to build a Ruby Blue version.

You can download it here on Github, and this is where you put it:

Mac: ~/Library/Application Support/Google/Chrome/Default/User StyleSheets/Custom.css

PC: \Users\YourUsername\AppData\Local\Google\Chrome\User Data\Default\User StyleSheets\Custom.css

It still needs a little love, so please feel free to fork and contribute!