color
Colors can be specified using one of five formats:
"#%2x%2x%2x" |
Red-Green-Blue (RGB) |
"#%1x%1x%1x" |
Shorthand Red-Green-Blue (RGB) |
"#%2x%2x%2x%2x" |
Red-Green-Blue-Alpha (RGBA) |
"H[, ]+S[, ]+V" |
Hue-Saturation-Value (HSV) 0.0 <= H,S,V <= 1.0 |
"H[, ]+S[, ]+V[, ]A" |
Hue-Saturation-Value-Alpha (HSVA) 0.0 <= H,S,V,A <= 1.0 |
| string | color name |
The specification for the RGB and RGBA formats are the format strings used by
sscanf to scan the color value. Thus, these values have the form "#RGB" or
"#RGBA", where R, G, B, and A each consist of 2 hexadecimal digits, and can
be separated by whitespace. As of Graphviz 9.0.0, RGB components can also be
given as 1 hexadecimal digit. These are each doubled to form 2-digit components,
similar to shorthand HTML colors. HSV colors have the form of 3 or (as of
Graphviz 8.0.1) 4 numbers between 0 and 1, separated by whitespace or commas.
String-valued color specifications are case-insensitive and interpreted in
the context of the current color scheme, as specified by the
colorscheme attribute. If this is undefined, the X11 naming
scheme will be used. An initial "/" character can be used to override the
use of the colorscheme attribute. In particular, a single initial "/"
will cause the string to be evaluated using the default X11 naming. If the
color value has the form "/ssss/yyyy", the name yyyy is interpreted using
the schema ssss. If the color scheme name is empty, i.e., the color has the
form "//yyyy", the colorscheme attribute is used. Thus, the forms
"yyyy" and "//yyyy" are equivalent.
At present, Graphviz recognizes the default color scheme X11, and the
Brewer color schemes (cf.
ColorBrewer).
Please note that Brewer color schemes are covered by this
license.
Examples:
| Color | RGB | HSV | String |
|---|---|---|---|
| White | "#ffffff" | "0.000 0.000 1.000" | "white" |
| Black | "#000000" | "0.000 0.000 0.000" | "black" |
| Red | "#ff0000" | "0.000 1.000 1.000" | "red" |
| Turquoise | "#40e0d0" | "0.482 0.714 0.878" | "turquoise" |
| Sienna | "#a0522d" | "0.051 0.718 0.627" | "sienna" |
The string value transparent can be used to indicate no color. This is only
available in the output formats ps, svg, fig, vmrl, and the bitmap formats.
It can be used whenever a color is needed but is most useful with the
bgcolor attribute. Usually, the same effect can be achieved by
setting style to invis.
Attributes
color is a valid type for: