The Scribble Ink has (or will have) a 16-bit RGB color sensor on one end, that is held up to the leaf, brick, person's face, or whatever it is that you like the color of. An integrated ARM 9 microprocessor subsequently analyzes the color and stores it. When you later want to draw or write in that color, the pen reproduces it by mixing ink from its cyan, magenta, yellow, white and/or black refillable cartridges.
It's reportedly possible to reproduce over 16 million colors, 100,000 of which can be stored on the Ink's 1GB of memory at one time. If you want to use and/or manage those colors on your smartphone or computer, the device also has a Micro USB port and Bluetooth 4.0 connectivity.