Where do I find HEX Color Codes?

You can find them by using one of those services:

• http://www.color-hex.com/
• http://www.colorhexa.com/
• https://coolors.co/

Remember, the HEX Color Codes look like this: #385D9B but if you wanted to use this color with the background feature of pdf2lp you would only use the part without "#" (&bg=385D9B):

http://pdf2lp.net/result.php?v=4824f269ecffc274aed01cbf3d0fe99484b02a38&bg=385D9B