So my theory is FunCom is better at picking colors than I am, but I needed a reference. So I wrote a quick module based on the default TextColors.xml. The module simply displays all the colors and their codes in a click window.

I've made two versions. AOColors.phps has all the colors. AOColors-Reduced.phps has all the colors, but I've removed most of the redundant colors.

http://zibby.isa-geek.net/bebot/AOColors/AOColors.phps
http://zibby.isa-geek.net/bebot/AOColors/AOColors-Reduced.phps

Commands:
/tell botname !aocolors
Displays a colorized list of AO color codes and their HEX color codes.

/tell botname !colorize (ao_color_code|HEX Color Code) <Message>
Displays message in the specified color.

Made a web page version: http://zibby.isa-geek.net/aocolors.php