Johns Color Scanner is an iPhone app designed to assist colorblind individuals in identifying colors. This educational and reference app utilizes the device's camera to capture a portion of the surroundings, providing a real-time view of the world. The app includes a small square sight that helps users focus on specific objects or areas.

When a picture is taken, the app analyzes the red, green, and blue values of the pixels within the sight. By averaging these values, Johns Color Scanner suggests color names using three different methods, all of which are explained in detail on the app's information screen.

To enhance usability, the app offers additional features. A "flashlight" button allows users to toggle the device's light on and off, providing better visibility in darker environments. The app also includes a "lock" button for devices that support camera exposure locking. This feature is particularly useful for accurately capturing lighter and brighter colors.

Johns Color Scanner is a free app developed by John Copeland. With its intuitive interface and practical functionality, it serves as a valuable tool for colorblind individuals seeking assistance in identifying colors.