From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.comp.tex.context/31283 Path: news.gmane.org!not-for-mail From: gnwiii@gmail.com Newsgroups: gmane.comp.tex.context Subject: Re: color question Date: Tue, 10 Oct 2006 13:30:12 -0300 Message-ID: <22af238a0610100930h4e84bd10ybe83da2e6489fad2@mail.gmail.com> References: Reply-To: mailing list for ConTeXt users NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Trace: sea.gmane.org 1160497861 11193 80.91.229.2 (10 Oct 2006 16:31:01 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Tue, 10 Oct 2006 16:31:01 +0000 (UTC) Original-X-From: ntg-context-bounces@ntg.nl Tue Oct 10 18:30:58 2006 Return-path: Envelope-to: gctc-ntg-context-518@m.gmane.org Original-Received: from ronja.vet.uu.nl ([131.211.172.88] helo=ronja.ntg.nl) by ciao.gmane.org with esmtp (Exim 4.43) id 1GXKUz-000572-Sy for gctc-ntg-context-518@m.gmane.org; Tue, 10 Oct 2006 18:30:34 +0200 Original-Received: from localhost (localhost [127.0.0.1]) by ronja.ntg.nl (Postfix) with ESMTP id 9366A1FD72; Tue, 10 Oct 2006 18:30:32 +0200 (CEST) Original-Received: from ronja.ntg.nl ([127.0.0.1]) by localhost (smtp.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 06702-02-6; Tue, 10 Oct 2006 18:30:25 +0200 (CEST) Original-Received: from ronja.vet.uu.nl (localhost [127.0.0.1]) by ronja.ntg.nl (Postfix) with ESMTP id CE7C81FD2A; Tue, 10 Oct 2006 18:30:24 +0200 (CEST) Original-Received: from localhost (localhost [127.0.0.1]) by ronja.ntg.nl (Postfix) with ESMTP id E73331FD2A for ; Tue, 10 Oct 2006 18:30:20 +0200 (CEST) Original-Received: from ronja.ntg.nl ([127.0.0.1]) by localhost (smtp.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 06702-02-5 for ; Tue, 10 Oct 2006 18:30:14 +0200 (CEST) Original-Received: from nf-out-0910.google.com (nf-out-0910.google.com [64.233.182.186]) by ronja.ntg.nl (Postfix) with SMTP id 9497A1FC84 for ; Tue, 10 Oct 2006 18:30:13 +0200 (CEST) Original-Received: by nf-out-0910.google.com with SMTP id h2so346701nfe for ; Tue, 10 Oct 2006 09:30:13 -0700 (PDT) Original-Received: by 10.82.101.3 with SMTP id y3mr792718bub; Tue, 10 Oct 2006 09:30:12 -0700 (PDT) Original-Received: by 10.82.129.17 with HTTP; Tue, 10 Oct 2006 09:30:12 -0700 (PDT) Original-To: "mailing list for ConTeXt users" In-Reply-To: Content-Disposition: inline X-Virus-Scanned: amavisd-new at ntg.nl X-BeenThere: ntg-context@ntg.nl X-Mailman-Version: 2.1.7 Precedence: list List-Id: mailing list for ConTeXt users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: ntg-context-bounces@ntg.nl Errors-To: ntg-context-bounces@ntg.nl X-Virus-Scanned: amavisd-new at ntg.nl Xref: news.gmane.org gmane.comp.tex.context:31283 Archived-At: On 10/10/06, Alan Bowen wrote: > If this is OT, my apologies to all. > > I am currently using ConTEXt to produce PDFs with a colored > background which I specify using R G B settings. Unfortunately, this > background does not look the same when others open the files on their > computers. Is there anything I can do at my end to correct this? There are well-known differences between various computer brands, and individual PC's generally vary widely. If you need really good agreement, then all the systems need to be viewed under similar light conditions and calibrated (e.g., using a colorimeter, or at least the GretagMacbeth ColorChecker, a printed chart) and you want to generate PDF's with a specific colorspace (not just deviceRGB). For most purposes, it seems to work to use a rough "sRGB" setting where you adjust the monitor (brightness, contrast) to approximate gamma=2.2. Check this with: . Many LCD's and worn-out CRT's like the ancient NCD on my desk will fail even this simple test. -- George N. White III Head of St. Margarets Bay, Nova Scotia