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Graphviz - colorscheme attribute

The value of colorscheme specifies a color scheme namespace.

The possible values of colorscheme seem(!) to be

x11
xvg (which defines 147 color names - but less colores because some colors go with grey and gray or because fuchsia and magenta refer to the same color).
one of the many of the brewer color scheme

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Graphviz - colorscheme attribute

See also