unofficial mirror of emacs-devel@gnu.org 
 help / color / mirror / code / Atom feed
From: "João Távora" <joaotavora@gmail.com>
To: Yuri Khan <yuri.v.khan@gmail.com>
Cc: Emacs developers <emacs-devel@gnu.org>,
	Stefan Monnier <monnier@iro.umontreal.ca>,
	Dmitry Gutov <dgutov@yandex.ru>
Subject: Re: VOTE: Changing completions-common-part face's default
Date: Thu, 7 Nov 2019 13:52:55 +0000	[thread overview]
Message-ID: <CALDnm51HgBMSz=ad6GHm7_vVK8Q5aL4iyZeLH=gBQAYfnAJDtg@mail.gmail.com> (raw)
In-Reply-To: <CAP_d_8VpXkD3FLYr3ChVV0DFFeimCzCGrOa0MpTOUFLQrNWp4Q@mail.gmail.com>

[-- Attachment #1: Type: text/plain, Size: 1172 bytes --]

On Thu, Nov 7, 2019 at 1:27 PM Yuri Khan <yuri.v.khan@gmail.com> wrote:

> I thought I’d chime in with some actual color science to back the
> feelings in this thread.

Very nice.  Thanks.

> There is no formula for calculating how distinguishable two different
> text colors on the same background are.

I would say that the next best thing is to calculate the contrast
difference between two colors period.

blue4 vs black is 1.27
blue3 vs black is 1.87

So very good for reading the text, very bad for distinguishing
the colors in two adjacent letters.

This points to a rule for finding the perfect good compromise:
find the color equidistant to both black and white that passes
both tests.  Of all the proposed faces so far, cyan4 seems to
come closest to passing both these bars. But I found DodgerBlue3
passes the "vs white" (4.7) bar and almost passes the "vs black"
bar (4.1).

So I'd propose that color for the GUI default.

On text terminals we could use whatever minibuffer-prompt uses.

João

(of course we could just let styles choose how it highlights completions
from a given face pool, but that's sadly off the table)

[-- Attachment #2: Type: text/html, Size: 1650 bytes --]

  reply	other threads:[~2019-11-07 13:52 UTC|newest]

Thread overview: 167+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-27  1:58 BIKESHED: completion faces Stefan Monnier
2019-10-27 11:34 ` João Távora
2019-10-27 21:45 ` Juri Linkov
2019-10-28  0:43   ` João Távora
2019-10-28 22:29     ` Juri Linkov
2019-10-28 23:31       ` João Távora
2019-10-29 21:53         ` Juri Linkov
2019-10-29 22:09           ` Dmitry Gutov
2019-10-29 22:57           ` João Távora
2019-10-29  1:12       ` Stefan Monnier
2019-10-29 21:58         ` Juri Linkov
2019-10-29 22:59           ` João Távora
2019-10-29 23:11 ` Dmitry Gutov
2019-10-30  1:49   ` Stefan Monnier
2019-11-03 21:53     ` Dmitry Gutov
2019-11-03 23:30       ` Stefan Monnier
2019-11-04 16:30         ` Dmitry Gutov
2019-11-04 18:31           ` Stefan Monnier
2019-11-04 22:52           ` João Távora
2019-11-04 23:25             ` Dmitry Gutov
2019-11-05 11:10               ` João Távora
2019-11-05 14:57                 ` Dmitry Gutov
2019-11-05 15:44                   ` Stefan Monnier
2019-11-05 16:30                     ` João Távora
2019-11-05 21:27                     ` Juri Linkov
2019-11-05 23:06                       ` Stefan Monnier
2019-11-05 22:01                     ` Dmitry Gutov
2019-11-06  0:18                       ` Stefan Monnier
2019-11-06  8:24                         ` Dmitry Gutov
2019-11-06 13:42                           ` VOTE: Changing completions-common-part face's default Stefan Monnier
2019-11-06 17:16                             ` João Távora
2019-11-06 17:26                               ` Dmitry Gutov
2019-11-06 18:10                                 ` João Távora
2019-11-06 22:20                                   ` Dmitry Gutov
2019-11-06 22:42                                     ` João Távora
2019-11-06 22:57                                       ` Dmitry Gutov
2019-11-06 23:14                                 ` Stefan Monnier
2019-11-07  8:09                                   ` Dmitry Gutov
2019-11-07 10:27                                     ` João Távora
2019-11-07 13:27                                       ` Yuri Khan
2019-11-07 13:52                                         ` João Távora [this message]
2019-11-07 14:41                                           ` Yuri Khan
2019-11-07 14:57                                             ` João Távora
2019-11-07 16:04                                               ` Stefan Monnier
2019-11-07 16:09                                                 ` João Távora
2019-11-07 14:43                                           ` Dmitry Gutov
2019-11-07 14:54                                             ` João Távora
2019-11-07 14:33                                       ` Dmitry Gutov
2019-11-07 14:44                                         ` João Távora
2019-11-07 14:58                                           ` Dmitry Gutov
2019-11-07 15:54                                             ` João Távora
2019-11-07 16:57                                               ` Drew Adams
2019-11-08 23:38                                               ` Dmitry Gutov
2019-11-09  0:24                                                 ` João Távora
2019-11-09  1:53                                                   ` Drew Adams
2019-11-09 21:57                                                     ` Juri Linkov
2019-11-09 22:17                                                       ` João Távora
2019-11-09  7:30                                                   ` Eli Zaretskii
2019-11-09 11:42                                                     ` João Távora
2019-11-09 12:04                                                       ` Eli Zaretskii
2019-11-09 13:22                                                         ` João Távora
2019-11-09 16:44                                                     ` Drew Adams
2019-11-07 15:08                                     ` Stefan Monnier
2019-11-08 10:15                                       ` Dmitry Gutov
2019-11-08 19:19                                         ` Stefan Monnier
2019-11-08 19:43                                           ` Eli Zaretskii
2019-11-08 21:42                                             ` Stefan Monnier
2019-11-09  6:52                                               ` Eli Zaretskii
2019-11-09 15:25                                                 ` Stefan Monnier
2019-11-09 15:52                                                   ` Eli Zaretskii
2019-11-09 16:17                                                     ` Stefan Monnier
2019-11-08 20:11                                           ` Dmitry Gutov
2019-11-08 22:57                                           ` João Távora
2019-11-06 23:12                               ` Stefan Monnier
2019-11-05 16:31                   ` BIKESHED: completion faces João Távora
2019-11-05 22:22                     ` Dmitry Gutov
2019-11-05 23:11                       ` João Távora
2019-11-06  8:18                         ` Dmitry Gutov
2019-11-06  8:53                           ` João Távora
2019-11-06 15:16                             ` Dmitry Gutov
2019-11-06 15:56                               ` João Távora
2019-11-06 10:25                           ` João Távora
2019-11-06 15:11                             ` Dmitry Gutov
2019-11-06 15:31                               ` João Távora
2019-11-06 15:43                                 ` Dmitry Gutov
2019-11-06 15:48                                   ` João Távora
2019-11-06 16:01                                     ` Dmitry Gutov
2019-11-06 16:20                               ` Eli Zaretskii
2019-11-06 21:36                               ` Juri Linkov
2019-11-07 14:25                                 ` Eli Zaretskii
2019-11-07 22:40                                   ` Juri Linkov
2019-11-08  6:43                                     ` Eli Zaretskii
2019-11-06 16:12                           ` Eli Zaretskii
2019-11-06 16:14                             ` João Távora
2019-11-06  0:24                       ` Stefan Monnier
2019-11-05 18:36               ` Stefan Monnier
2019-11-05 18:51                 ` Eli Zaretskii
2019-11-05 19:16                   ` João Távora
2019-11-05 19:23                     ` Eli Zaretskii
2019-11-05 21:43                       ` João Távora
2019-11-06 16:03                         ` Eli Zaretskii
2019-11-06 16:26                           ` João Távora
2019-11-06 18:07                             ` Eli Zaretskii
2019-11-06 18:14                               ` João Távora
2019-11-06 18:29                                 ` Eli Zaretskii
2019-11-06 18:48                                   ` João Távora
2019-11-06 20:51                                   ` Ergus
2019-11-07 14:08                                     ` Eli Zaretskii
2019-11-07 14:28                                       ` João Távora
2019-11-07 14:47                                         ` Eli Zaretskii
2019-11-07 15:00                                           ` João Távora
2019-11-07 15:40                                             ` Eli Zaretskii
2019-11-07 16:00                                               ` João Távora
2019-11-07 17:39                                                 ` Eli Zaretskii
2019-11-07 17:53                                                   ` João Távora
2019-11-07 18:16                                                     ` Eli Zaretskii
2019-11-07 18:37                                                       ` João Távora
2019-11-07 21:07                                                         ` Eli Zaretskii
2019-11-07 21:43                                                           ` João Távora
2019-11-08  6:35                                                             ` Eli Zaretskii
2019-11-08 10:15                                                               ` João Távora
2019-11-08 14:02                                                                 ` Eli Zaretskii
2019-11-08 15:09                                                                   ` João Távora
2019-11-08 15:33                                                                     ` Eli Zaretskii
2019-11-08 16:01                                                                       ` João Távora
2019-11-08 16:16                                                                         ` Eli Zaretskii
2019-11-08 16:27                                                                           ` João Távora
2019-11-08 17:05                                                                             ` Eli Zaretskii
2019-11-08 17:21                                                                               ` João Távora
2019-11-08 19:06                                                                                 ` Eli Zaretskii
2019-11-08 22:49                                                                                   ` João Távora
2019-11-09  6:57                                                                                     ` Eli Zaretskii
2019-11-09 11:20                                                                                       ` João Távora
2019-11-09 11:51                                                                                         ` Eli Zaretskii
2019-11-09 12:14                                                                                           ` João Távora
2019-11-09 12:19                                                                                             ` Eli Zaretskii
2019-11-09 13:29                                                                                               ` João Távora
2019-11-09 13:52                                                                                                 ` João Távora
2019-11-09 15:31                                                                                                 ` Eli Zaretskii
2019-11-09 18:51                                                                                                   ` João Távora
2019-11-10  9:18                                                                                                   ` Dmitry Gutov
2019-11-14  9:45                                                                                                     ` Eli Zaretskii
2019-11-14 10:40                                                                                                       ` Dmitry Gutov
2019-11-14 14:16                                                                                                         ` Eli Zaretskii
2019-11-14 14:19                                                                                                           ` João Távora
2019-11-14 14:42                                                                                                             ` Eli Zaretskii
2019-11-14 14:49                                                                                                               ` João Távora
2019-11-16 20:10                                                                                                       ` Juri Linkov
2019-11-16 23:40                                                                                                         ` João Távora
2019-11-17 17:27                                                                                                           ` Eli Zaretskii
2019-11-17 17:47                                                                                                             ` João Távora
2019-11-08 12:58                                                               ` Stefan Monnier
2019-11-08 13:08                                                                 ` João Távora
2019-11-08 14:07                                                                 ` Eli Zaretskii
2019-11-06 20:34                               ` Drew Adams
2019-11-06 20:42                                 ` Eli Zaretskii
2019-11-05 21:40                     ` Dmitry Gutov
2019-11-05 23:02                       ` Stefan Monnier
2019-11-05 18:54                 ` João Távora
2019-11-05 19:07                   ` Stefan Monnier
2019-11-05 21:39                   ` Dmitry Gutov
2019-11-05 21:54                     ` João Távora
2019-11-05 21:55                       ` Dmitry Gutov
2019-11-05 21:54                 ` Dmitry Gutov
2019-11-05 21:58                   ` João Távora
2019-11-05 22:03                     ` Dmitry Gutov
2019-11-05 22:07                       ` João Távora

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: https://www.gnu.org/software/emacs/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CALDnm51HgBMSz=ad6GHm7_vVK8Q5aL4iyZeLH=gBQAYfnAJDtg@mail.gmail.com' \
    --to=joaotavora@gmail.com \
    --cc=dgutov@yandex.ru \
    --cc=emacs-devel@gnu.org \
    --cc=monnier@iro.umontreal.ca \
    --cc=yuri.v.khan@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).