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Re: list-colors-display: display all color names

From: Eli Zaretskii
Subject: Re: list-colors-display: display all color names
Date: Tue, 04 Jan 2005 23:09:47 +0200

> From: Juri Linkov <address@hidden>
> Date: Tue, 04 Jan 2005 11:07:55 +0200
> Cc: address@hidden
> It's possible to use #RRGGBB hex color specifications instead of
> color names.

Actually, where Emacs interprets such color specs, it uses
#RRRRGGGGBBBB (i.e. 16 bits per color).  In other places, it doesn't
care whether you use 1, 2, 3, or 4 hex digits per principal color (it
passes the spec verbatim to X functions).

> it might be difficult for users to obtain corresponding hex values.

How about adding a function color-values-hex, which calls color-values
and then transforms the result into the hex #RGB notation?  Would that
fix this problem?

> Also, users might want to find the color name corresponding to
> the known RGB value.

Is there any reasonably practical way to do that for an arbitrary RGB

For more-or-less standard RGB values, the ones listed in
tty-colors.el, doing that is simply a matter of searching the alist
returned by tty-color-alist; if trhat is what you want, does this
justify a new feature?

> All I propose now is to add color hex values to the *Colors* buffer.
> I think that placing them at the right window edge would not be
> distracting.  For example:
> gray                    grey                                   bebebe
> light gray              light grey, LightGray, LightGrey       d3d3d3

First, if we do that, I'd suggest to use #BE12BE34BE56, i.e. prefix
with # and use 4 digits per color.

And second, what do you suggest to display on character terminals?

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