From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stephen Berman Newsgroups: gmane.emacs.help Subject: Re: Returning hex value from rgb combination (each from 0 to 255) Date: Sat, 31 Aug 2024 23:26:45 +0200 Message-ID: <87o758jsdm.fsf@gmx.net> References: <867cbwbnb7.fsf@gnu.org> <8634mky3va.fsf@hotmail.com> <864j70blef.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="36999"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Cc: help-gnu-emacs@gnu.org To: Heime Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sat Aug 31 23:27:36 2024 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1skVd9-0009TJ-QI for geh-help-gnu-emacs@m.gmane-mx.org; 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envelope-from=stephen.berman@gmx.net; helo=mout.gmx.net X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, FREEMAIL_REPLY=1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 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-mx.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:147873 Archived-At: On Sat, 31 Aug 2024 18:44:22 +0000 Heime wrot= e: > On Sunday, September 1st, 2024 at 6:24 AM, Eli Zaretskii = wrote: > >> > From: Vagn Johansen gonz808@hotmail.com >> > Date: Sat, 31 Aug 2024 19:54:49 +0200 >> > >> > Eli Zaretskii eliz@gnu.org writes: >> > >> > > > Date: Sat, 31 Aug 2024 17:10:27 +0000 >> > > > From: Heime heimeborgia@protonmail.com >> > > > >> > > > How can I make a function that takes r g and b values (from 0 to = 255) and >> > > > returns the corresponding hex value ? >> > > >> > > What is "the corresponding hex value"? >> > >> > Probably the format used by color-rgb-to-hex >> > >> > (color-rgb-to-hex 1 0 0 2) =3D> "#ff0000" >> >> >> Then he had better used (color-rgb-to-hex 1 0 0) instead, as 2 digits >> per component will get him in trouble eventually. > > But this requires values from 0.0 to 1.0 rather than from 0 to 255. So define a function that takes integer RGB values between 0 and 255 and divide them by 255.0 before passing them to color-rgb-to-hex. Steve Berman