Name Rascal/Libraries/Vis/Figure/ColorModel

Synopsis The model used for defining colors.

Types alias Color = int;

Details arbColor color colorNames colorScale colorSteps gray interpolateColor palette rgb

Description A color is expressed in the RGB color space and consists of a red, green and blue ingredient; each can have a value in the range [0-255]. In addition, colors can have a transparency, expressed as a percentage between 0.0 (completely opaque) and 1.0 (completely transparent). One can also refer to colors by name. The full range of X11 (HTML) Colors is supported.

A color can be constructed using:

• the integer value of the color (RGBA, 8 bits per color)
• the rgb function that combines the red, green and blue ingredient into an integer representation of the color.
• the color function that maps color names to color values.
• the gray function that creates gray scale values.
• the arbColor function that creates an arbitrary color.

The following properties use colors:

• lineColor: sets the color of lines and borders.
• fillColor: sets the color for filling the inside of a figure.
• fontColor: sets the color for text.

all these properties accept a Color value or, for convenience, also a color name.

Examples

b1 = box([size(50), fillColor("MidNightBlue")]);
render(b1);

displays:

We can also use the RGB value of MidNightBlue directly

b2 = box([size(50), fillColor(rgb(25,25,112))]);
render(b2);

and obtain (unsurprisingly) the same result:

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