Arduino UNO and joystick control of an RGB LED

This Arduino UNO project uses a joystick to control an RGB LED. When the joystick is at a certain position, the LED changes colors.

An RGB LED is a type of LED that can reproduce almost any colour. They are used in many applications such as LED matrix displays, home lighting, stage lighting and more.
RGB LEDs have three internal LEDs (Red, Green, and Blue) that can be combined to produce almost any color output. In order to produce different kinds of colors, we need to set the intensity of each internal LED and combine the three color outputs.
This worksheet is based on a common cathode RGB LED.