From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: function to get inverse color name? Date: Fri, 25 Apr 2014 00:58:58 +0200 Organization: Aioe.org NNTP Server Message-ID: <87oazq49n1.fsf@nl106-137-194.student.uu.se> References: <2c7e7b5b-73ec-45ae-9bf5-b638aad861ff@googlegroups.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1398383708 20276 80.91.229.3 (24 Apr 2014 23:55:08 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 24 Apr 2014 23:55:08 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Apr 25 01:55:03 2014 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WdTTo-00050y-TQ for geh-help-gnu-emacs@m.gmane.org; Fri, 25 Apr 2014 01:55:01 +0200 Original-Received: from localhost ([::1]:45741 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WdTTo-0004B9-JE for geh-help-gnu-emacs@m.gmane.org; Thu, 24 Apr 2014 19:55:00 -0400 Original-Path: usenet.stanford.edu!news.tele.dk!news.tele.dk!small.news.tele.dk!newsfeed.xs4all.nl!newsfeed4a.news.xs4all.nl!xs4all!news.stack.nl!aioe.org!.POSTED!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 18 Original-NNTP-Posting-Host: VVbyYd/iFZoeWNmD9i++cQ.user.speranza.aioe.org Original-X-Complaints-To: abuse@aioe.org User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) X-Notice: Filtered by postfilter v. 0.8.2 Cancel-Lock: sha1:kTOovXS0fO+rRZ7e0Q9AgrkRXyY= Mail-Copies-To: never Original-Xref: usenet.stanford.edu gnu.emacs.help:205093 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:97357 Archived-At: unfrostedpoptart 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