Hex Codes are a way to display a color. They represent the RGB color, but are displayed in hexadecimal. Hex Codes are used in replacement of a color name, and can be more custom. You can use a website to create a hex code, or figure it out yourself. A hex code will look like this: #001122. It can have numbers and letters A-F. A represents 10, B represents 11, C is 12, D is 13, E is 14, and F is 15. The first two digits are the red value, the next two green, and the final two blue. #FF0000 would be plain red, because the red value is FF and the green and blue are 0.