Phone and computer screens are the window into the digital world of color, but if you are approving colors via email or text you need to be aware of the limitations. For starters, each of your devices relies on a different color model to display color. Input devices – your camera and monitor – use the additive color model to display color. They start with darkness and add red, green, and blue light to create a spectrum of colors. Printers, on the other hand, use the s...