This is how you make a rainbow using the color code a letters:

Step 1: Think of a dark color,for a examaple ill use red.

Step 2:Think what color is lighter than red,or what ever color you chose. Yellow is lighter than red.

Step 3:Keep goin farther down the color scale until you reach the darkest color,for this example that is violet.

Step 4ut all the colors in order from darkest to lightest,or the other way around.

Step 5:Make your Rainbow with your colors!

Example:

Nicki

Minaj

Thank for reading,i made this because to many people were asking me how to do this.