Here is summary of the graphviz dot language
This are the dot language attributes
This is example of dot html labels without using
To set the fill and bordercolor of a node in dot language use this:
/* how to set the bordercolor of a node to green */
/* border color is green, fillcolor is red */
and this looks like this:
A page showing the colornames with the colors and hex value is here
At least with older graphviz versions a graph can end with a '@'
char and after that anything can be added for example text what the
graph data is about, but this feature is not in newest dot.