From: Emanuel Berg <embe8573@student.uu.se>
To: help-gnu-emacs@gnu.org
Subject: Re: function to get inverse color name?
Date: Fri, 25 Apr 2014 00:58:58 +0200 [thread overview]
Message-ID: <87oazq49n1.fsf@nl106-137-194.student.uu.se> (raw)
In-Reply-To: 2c7e7b5b-73ec-45ae-9bf5-b638aad861ff@googlegroups.com
unfrostedpoptart <david@therogoffs.com> writes:
> Does anyone have a function that takes a named color
> (e.g. "Red") and returns the inverse? I guess it
> would convert the name to RRGGBB, subtract each 8-bit
> value from 256, and then convert back to a name.
;; Try this:
;; "#FFFFFF" is white, so this will produce - "black"
(let ((color (color-values (color-complement-hex "#FFFFFF"))))
(dolist (c (tty-color-alist))
(if (eq color (cddr c)) (return (car c))) ))
--
underground experts united:
http://user.it.uu.se/~embe8573
prev parent reply other threads:[~2014-04-24 22:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-24 3:03 function to get inverse color name? unfrostedpoptart
2014-04-24 13:44 ` Drew Adams
2014-04-24 18:08 ` David Rogoff
2014-04-24 17:51 ` Emanuel Berg
2014-04-24 22:58 ` Emanuel Berg [this message]
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