Returns the gray level of a color specification.
color
color-level color-spec => gray-level
color-spec
A color specification.
gray-level
Color component from the :gray model.
:gray
Return the gray level of color-spec . If color-spec is not from the :GRAY model, the component is calculated.
:GRAY
COLOR 2 > (color:make-gray 0.66667s0)
#(:GRAY 0.66667S0)
COLOR 3 > (color-level *)
0.66667S0
COLOR 4 >
make-hsv make-rgb make-gray color-model color-<component>