Example with the javascript programming language presented in my codepen account solves the following issues:
- create HTML tag div for each for iteration;
 - create an id for each div tag;
 - build an RGB color with red, green, and blue using a random function;
 - read that id and used to set the color background of each div;
 - print the RGB value for each color and set background color;
 
Let's see the example:
See the Pen by Cătălin George Feștilă (@catafest) on CodePen.