Color Blindness

[JavaHead Jonnie]

I have perfect eyesight, which is a problem for me; I can't tell if color blind people can see my text, so can someone please tell me if the text in this screeny looks OK?

( IMG: http://www.pedro.frandt.com/Colors.gif )

Thanks & Regards, Jonnie

[sharkey]

Im not sure but it is either section 508 or AAA use a one of their validators that test for the colour i think but no validator is as good as a human.

And i would say it is readable.

[Fang]

Color blind tests (http://www.iamcal.com/toys/colors/)
Keep grayscale contrast as high as possible, yours is on the limit.

[JavaHead Jonnie]

OK, I was getting a bit worried. From that site, as you say Fang, I think I am on the limit so to be safe I think I might look into changing the colors a bit.

[rhsunderground]

if you can distinguish between grays, it is most likely that even a person with full blown color blindness will be able to as well, if not better than yourself.

[DaveSW]

check out some of the tools in my dmoz section: http://dmoz.org/Computers/Internet/Web_Design_and_Development/Authoring/Online_Tools/Checking_and_Debugging/Accessibility/
I think there are a few links which actually do full page tests in different deficiencies.

[rhsunderground]

wow. those are some interesting links dave. thanks!

[DaveSW]

np! I've added Fang's link in the interests of completeness!

[JavaHead Jonnie]

Thanks. There's some really great tools there!

[DaveSW]

Cheers
If you find any more... ;)

[rhsunderground]

please don't spam these forums.

thank you,

-administration

[Webnauts]

I did not understand what our admin met here with spamming.

I hope it would not be considered as spamming, if I add some resources here:

"Can your audience read your web pages? "1 in 12 people suffer from some sort of color deficiency".
For example about 8% of men and a few women are colour blind."

Resources:
1. Using Colour on the Web: http://www.saila.com/usage/colour/
2. Color Blindness and Color Discrimination: http://more.btexact.com/people/rigdence/colours/colours.pdf
3. Effective Color Contrast: http://www.lighthouse.org/color_contrast.htm
4. Designing for the Color-Challenged: A Challenge: http://www.internettg.org/newsletter/mar99/accessibility_color_challenged.html
5. Accommodating Color Blindness: http://www.stcsig.org/usability/newsletter/9910-color-blindness.html
6.Colors For The Colorblind: http://www.designmatrix.com/pl/cyberpl/cftcb.html
7. Color visions - color deficiency: http://www.firelily.com/opinions/color.html
8. Considering the Color-Blind: http://www.webtechniques.com/archives/2000/08/newman/
9. People Who Are Colorblind or Have Different Color Vision: http://webexhibits.org/causesofcolor/2.html
10. What do colour-blind people see? http://www.tsi.enst.fr/~brettel/colourblindness.html
11. Colour transformations - Decimal: http://more.btexact.com/people/rigdence/colours/colours1.html
12. Colours confused with neutrals (Hex): http://more.btexact.com/people/rigdence/colours/neutrals_hex.html
13. Frequently Asked Questions: http://www.visibone.com/color/faq.html

Tools and Utilities:
1. Color Blindness Tool: http://www.q42.nl/demos/colorblindnesssimulator/colors.html
2. Colour Contrast Analyser: http://www.juicystudio.com/services/colourcontrast.asp
3. Colour Picker and Tester: http://www.tesspub.com/colours.html
4. Vischeck simulates colorblind vision: http://www.vischeck.com
6. Colorblind Web Page Filter: http://colorfilter.wickline.org/
5. Ishihara Test for Color Blindness: http://www.toledo-bend.com/colorblind/Ishihara.html
6. Color Metric Converter: http://colorpro.com/info/tools/convert.htm
7. Diverse off-line and online software list for color conversions: http://colorpro.com/info/tools/converters.html
8. Color shemes: http://www.pixy.cz/apps/barvy/index-en.html

Tutorials:
1. Colors Tutorial: http://www.ergogero.com/FAQ/cfaqhome.html
2. Type and color: http://www.joeclark.org/book/sashay/serialization/Chapter09.html
3. Hex/RGB Converting Tutorial and vice versa: http://www.htmlcenter.com/tutorials/tutorials.cfm/111/General/[/quote]

[DaveSW]

Originally posted by Webnauts I did not understand what our admin met here with spamming.

A large quantity of spam posts were removed yesterday from the forums using a mass prune. this has left responses to those posts appearing to be addressed to the wrong people, and this is in fact what has happened here. Go ahead and list any resources you want.

incidentally welcome back webnauts.

[Webnauts]

Thanks Dave. I think I must get a bit more active here. I see that our co-members here are concerned about accessibility and therefore I will definetely do my best to support them.

[DaveSW]

Hopefully we can stimulate more interest among the people in the javascript forum, but maybe that's asking too much... other than that most people are fairly considerate of other users.

I've added a few of your links to my dmoz category, I hope you don't mind.

[DaveSW]

do you have a post somewhere with resources for atarting accessibility - e.g. links for beginners, that sort of thing? if so maybe I could make it a sticky here.

[Webnauts]

Sure I don't mind Dave.
I only want that articles and tutorials must have my name as author and a link to my homepage.

[Webnauts]

Originally posted by DaveSW
do you have a post somewhere with resources for atarting accessibility - e.g. links for beginners, that sort of thing? if so maybe I could make it a sticky here.

I have an excellent collection of links about accessibility, but it is something like max. 1500 characters, and I could not post them here, while I can post only 1000 characters.

[DaveSW]

can you split it into two?

[Webnauts]

I can give it a try.

[Stephen Philbin]

I remember reading somewhere (I think it was somewhere at the W3C) that a simple basic rule of thumb for ensuring readability for the colour-blind was actually not to worry about actual colour so much and rather focus on making sure it was the brightness levels of the elements that gave contrast as opposed to colour.

[Webnauts]

Originally posted by Webnauts
I can give it a try.

I posted my web accessibility resources in two parts.
Would be great if you would have a look and stick them.

[DaveSW]

stuck and now looking... :)

[Webnauts]

Originally posted by Mr Herer
I remember reading somewhere (I think it was somewhere at the W3C) that a simple basic rule of thumb for ensuring readability for the colour-blind was actually not to worry about actual colour so much and rather focus on making sure it was the brightness levels of the elements that gave contrast as opposed to colour.

I think this resource/tool can answer your question: http://juicystudio.com/services/colourcontrast.asp

[Webnauts]

Originally posted by DaveSW
stuck and now looking... :)

That was quick!!! :)

[DaveSW]

The forum emails me whenever there is a new thread created in here, so I can usually evaluate the title in the email and decide how much attention it needs - at one point I was moving tons of threads every day from people who couldn't be bothered to look which forum to post in...

[Fang]

Nice Color Scheme Generator (http://wellstyled.com/tools/colorscheme2/index-en.html) with built in color blindness changer.

[Webnauts]

Originally posted by Fang
Nice Color Scheme Generator (http://wellstyled.com/tools/colorscheme2/index-en.html) with built in color blindness changer.

Fang thanks for this great tool.

[JavaHead Jonnie]

Hehe - I finally made a usefull topic :)