Now that’s an awesome way to leverage the WordPress 3.4 theme customizer! The Custom Design upgrade on WordPress.com gets a Custom Colors update — it allows you to color your blog to your taste, with those awesome predefined color palettes, color matching recommendations, or complete control with manual color picking.
Let’s hope the whole Custom Design package makes it into Jetpack sooner or later, though it’s going to be quite a challenge to support themes you have no control of, unlike WordPress.com. I’d really love to use these features with the self-hosted version. What about you?