These images show the pixels on the screen of an iPhone 6. Every pixel is made up of 3 parallel bands of colored lights. By adjusting the brightness of these bands, the screen simulates different colors. This method is called the RGB system, named after the red, green, and blue bands.
This post includes images of a hundred-dollar bill. This bill is remarkably more colorful in comparison to other lower value bills and it also includes many more security features. These features include holograms and random lines that makes it exceedingly difficult to copy.