You can use your photos to pick up various colors, but if you need a professional way to capture colors, the following SwatchMate color capturing cube should be more suitable for you.
SwatchMate is a Bluetooth enabled color capturing device designed to offer you an easy way to capture your favorite colors. As we can see from the images, the color capturing device features minimal cube design, and comes with a built-in light source and a color sensor, just placing the cube on any surface, and pressing the button on the top, you can use it to capture colors on the surface, while using built-in Bluetooth technology, the color capturing cube is able to transmit color info to your smartphone, and showing you using custom designed application to feed your inspiration.
At present the team of SwatchMate is raising fund at Kickstarter. Pledging $85 AUD will let you own the color capturing cube. If you’re interested, jump to Kickstarter official site for more details.