Some themes don't change Sources
tab color. Different themes, different styles. Try to use something else. I would recommend these ones (all of them change Sources
tab background color):
MNML: https://github.com/frontdevde/mnml-devtools-theme/blob/master/Custom.css Ruby Blue: https://github.com/chrisbateman/ChromeDevToolsTheme-RubyBlue/blob/master/Custom.css Tomorrow: https://gist.github.com/bentruyman/1163300
Do the same steps, but use one of Custome.css
files I mentioned above.