The WS2812B is a popular RGB LED that is used in various lighting applications. 
It consists of a single LED package with built-in control circuitry, allowing each LED to be individually controlled and programmed.
It uses the one-wire digital interface communication protocol which is a simple easy to control a large number of LEDs using a microcontroller.
Each LED has a unique address, which allows individual control over each LED in a strip or matrix configuration. This means you can set different colors and brightness levels for each LED in the chain.
The WS2812B LED is capable of producing a wide range of colors using the RGB (Red, Green, Blue) color model. 
By adjusting the intensity of the red, green, and blue channels, We can create a virtually unlimited range of colors.
Here we will send the hex color code to the RGB LED to generate the unlimited colors, for example, to generate the red color send the FF0000 hex value to the RGB LED.
Similarly to generate the green color send the 00FF00 value similarly for white FFFFFF.