> According to this classification, yellow is a dark color,
> as it were suitable as a foreground color for light backgrounds.
>
> I think that is a non-issue. Emacs never chooses foreground colors
> based on such a classification. The only thing Eacs does based on
> this classification is to set the background mode. So this
> classification has no relevance for anything else.
Sorry, I mixed foreground and background. That sentence should read
as follows:
According to this classification, yellow is a dark color, as
suitable background color for a light foreground color.
> OTOH, the formula I proposed in January produces the same
> classification on TTY, xterm and X as:
>
> Dark: black red green blue magenta
> Light: yellow cyan white
>
> Could you propose it again now?
(let ((bg-color-values (x-color-values bg-color))
(white-values (x-color-values "white")))
(>= (+ (* (nth 0 bg-color-values) 0.30)
(* (nth 1 bg-color-values) 0.59)
(* (nth 2 bg-color-values) 0.11))
(* (+ (* (nth 0 white-values) 0.30)
(* (nth 1 white-values) 0.59)
(* (nth 2 white-values) 0.11))
.6)))
--
Juri Linkov
http://www.jurta.org/emacs/
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