220637 - Possibility to force background/text contrast increase

Status: NEW

(SeaMonkey :: Preferences, enhancement)

Description

[Joosep-Georg Järvemaa]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5) Gecko/20030917
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5) Gecko/20030917

I'm proposing the following options for appearance preferences:

+-- When a page provides hardly distinguishable colors --------+
|                                                              |
|  [x] Increase text and background contrast to       [  50% ] |
|  [x] Increase link and visited link contrast to     [  30% ] |
|                                                              |
+--------------------------------------------------------------+

Reproducible: Always

Steps to Reproduce:

Comment 1

[Jon Henry]

Confirming request, this seems like a win for accessibility, although I'm not
quite sure how you would decide on "nearly identical" colors.

Comment 2

[Ben Goodger (use ben at mozilla dot org for email)]

Mass reassign of my non-Firefox bugs to [e-mail]

Comment 3

[Robin Whittleton]

I've been thinking about this a bit recently. Ideally I'd like the w3c to add
'relative colours' to CSS but in the absence of that having the ability to
increase contrast in the browser would be nice. Instead of the UI that
Joosep-Georg suggests I was envisiging something more akin to the current
font-size adjustment (a submenu under view and three keys for inc/dec/reset).

I'm not sure how you'd cope with background images (or even if you would) but
assuming CSS specified color and background color an algorithm could check the
luminance values and increase/decrease accordingly. For the nearly identical
colors mentioned by Jon it might take a few more levels to increase but you'd
get there eventually.

Quite a lot of sites are providing font-size UI but only one site springs to
mind for contrast (http://www.zeldman.com) and that's an alternative stylesheet,
not a in-page UI. This seems like it'd be a big accessibility win.

Comment 4

[Jesse Ruderman]

See also bug 378955, a similar request for Firefox.  I wonder if this should be considered a Core thing rather than a Seamonkey/Firefox thing.

Comment 5

[Serge Gautherie (:sgautherie)]

(Filter "spam" on 'prefs-nobody-20080612'.)

Comment 6

[Felix Miata]

Mike Connor just changed bug 378955 to core, so now one of these should probably be a dupe of the other.