kuler is a neat online application from Adobe that allows you to create, and share, color schemes online. This is a boon for someone like me, who has trouble dressing himself let alone figuring out what color combos will look good on a website.
Recenlty Adobe added the ability to subscribe to RSS feeds of popular schemes. While that's cool, it isn't really all that interesting until, that is, Adobe created a widget that lets you see combos on Dashboard. Now, the perfect color scheme for that Apple blog you've been thinking about starting is just a keystroke away!