You’ll find this in Applications > Utilities.
It’s a quick/convenient way to get colors from webpages/PDFs etc. (albeit in RGB format) without needing a browser plugin.
This extension lets you add define URLs using a regular expression, and have Chrome (or Opera) colourise the favicon in a colour of your choice.
Ideal for reducing the chance you’ll get your dev, staging and production servers mixed up.
Amazon Web Services now have a product called Device Farm that lets you test apps and websites on Android, iOS (and Kindle Fire) devices [list], via a web browser. $0.17 (~ £0.12) a minute with first 250 minutes free.
What’s encouraging is this may mean Apple are allocating greater resources to Safari development.