Returns a color specification in the gray model.
color
make-gray level &optional alpha => color-spec
level⇩ |
A color component used to define the gray level required. |
alpha⇩ |
A number between 0 and 1, or nil . |
color-spec |
A color specification. |
The function make-gray
returns a color-spec in the :gray
model with component level.
Note that short-floats are used for the component; this results in the most efficient color conversion process. However, any floating point number type can be used.
alpha indicates the alpha value of the color. 0 means it is transparent, 1 means it is solid. If alpha is nil
or not specified then the color does not have an alpha component and it is assumed to be solid.
CL-USER 25 > (color:make-gray 0.66667s0) #(:GRAY 0.66667S0)
make-hsv
make-rgb
color-model
color-blue
color-level
color-alpha
15.1 Color specs
CAPI User Guide and Reference Manual (Unix version) - 01 Dec 2021 19:33:10