How do I get hex value for field categoryhex on creating category? I want to create a new category to my Drupal site but I need to set an categoryhex but I don't know which value I need to set here. 



Thanks for your help.
That hexadecimal value of the color. You can get the hex value of the color from here - http://www.w3schools.com/html/html_colornames.asp
http://www.color-hex.com/color-names.html