ColorPicker4Hue

You want to match the color of your hue lights to the color of your curtains, your carpet, or even your coffee cups? This app will let you do that. Just use your iPhone camera to point at ordinary objects and 'click': your lights will be set to the captured color. It's that easy!

With the lights set to a certain color, the brightness- and saturation sliders on the camera screen can be used to tweak your light settings to get them just right.

Of course, you can decide for yourself exactly which lights will be used. And you can easily swipe between the camera screen and the lights list if you want to make changes.