Allow to change color scheme

[Hugo Freire Gil]

[Yaron Y Goland]

+1

The current black and white color scheme really makes the graphs, in my opinion, look flat and harder to read. PlantUML, for example, uses a red and yellow color scheme that makes the graphs 'pop' and thus makes them easier for people like me to understand.

[Hugo Freire Gil]

add skinparam monochrome false to your graph.