REBOL Programming/brightness?

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USAGE:[edit]

BRIGHTNESS? color 

DESCRIPTION:[edit]

Returns the monochrome brightness (0.0 to 1.0) for a color value.

BRIGHTNESS? is a function value.

ARGUMENTS[edit]

  • color -- (Type: tuple)

SOURCE CODE[edit]

brightness?: func [
    {Returns the monochrome brightness (0.0 to 1.0) for a color value.} 
    color [tuple!]
][
    (0.27 * color/1) + (0.63 * color/2) + (0.1 * color/3) / 255
]