Re: Using variables instead of hex values

[Jean Louis]

* Jean Louis <bugs@gnu.support> [2021-11-08 19:50]:
> * irenezerafa via Users list for the GNU Emacs text editor 
> <help-gnu-emacs@gnu.org> [2021-11-08 11:05]:
> > I have the following piece of code and would like to use variable names 
> > instead of
> > using hex values directly.
> > 
> > (eval-when-compile
> > (defmacro rich-faces ()
> > (let ( (faces '())
> > (light-colors [ "#a8007f" "#005f88" "#904200" "#7f10d0"
> > "#006800" "#b60000" "#1f1fce" "#605b00" "#000000"])
> > (dark-colors [ "#ff62d4" "#3fdfd0" "#fba849" "#9f80ff"
> > "#4fe42f" "#fe6060" "#4fafff" "#f0dd60" "#ffffff" ]) )
> 
> (color-name-to-rgb "white") ⇒ (1.0 1.0 1.0)
> (color-rgb-to-hex 1.0 1.0 1.0) ⇒ "#ffffffffffff"
> 
> (defun my-color-name (color)
>   (apply 'color-rgb-to-hex (color-name-to-rgb color)))
> 
> (my-color-name "white") ⇒ "#ffffffffffff"
> (my-color-name "red") ⇒ "#ffff00000000"

To add, you wanted variables instead of hex, then you would do
something like:

(setq white-color (my-color-name "white")) ⇒ "#ffffffffffff"

and then use it as:

(light-colors [ white ] )

-- 
Jean

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