a question about color

[inspurer]

first, thanks for your contributions on this awesome project

i have succeed running it with my own relationship data, but i find that the color is always white and not colorful as demo at your readme using any dataset of my own's, what can i do to make it more colorful? i just wonder are there specific features that dataset should have would result in a colorful graph?, so far i have got it that the color is determined by the layout.

thanks again, i am waiting for your response~