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15.4.1 Colors

Colors may be specified in three ways: 1) RGB triplets, 2) by name, or 3) by HTML notation.

RGB triplet

An RGB triplet is a 1x3 vector where each value is between 0 and 1 inclusive. The first value represents the percentage of Red, the second value the percentage of Green, and the third value the percentage of Blue. For example, [1, 0, 1] represents full Red and Blue channels resulting in the color magenta.

short or long name

Eight colors can be specified directly by name or by a single character short name.

Name	Color
‘k’, "black"	blacK
‘r’, "red"	Red
‘g’, "green"	Green
‘b’, "blue"	Blue
‘y’, "yellow"	Yellow
‘m’, "magenta"	Magenta
‘c’, "cyan"	Cyan
‘w’, "white"	White

HTML notation

HTML notation is a string that begins with the character ‘#’ and is followed by either 3 or 6 hexadecimal digits. As with RGB triplets, each hexadecimal number represents the fraction of the Red, Green, and Blue channels present in the specified color. For example, "#FF00FF" represents the color magenta.