[Gllug] Perl Question - Spam Filter for NMS Form Mail

[Henry Gilbert]

2009/2/9 Ryan Cartwright <r.cartwright at equitasit.co.uk>:
> 2009/2/9 Henry Gilbert <henry.gilbert at gmail.com>:
>> 2009/2/9 Ryan Cartwright <r.cartwright at equitasit.co.uk>:
>>> I'm colour blind and certain colour combinations have been known to
>>> make me pass out, others can render text completely invisible. I don't
>>> use a screen reader and have otherwise good vision. I would generally
>>> view the same site as "the rest" but on some sites I just can't see
>>> anything or the colours make me physically sick.
>>>
>>>
>>
>> Could you let me know please which combinations these are?
>
> I have red/green colour-blindness (deuteranopia - the most common
> form) but my experience tells me that even within the same form there
> are variations and different people seem to struggle with different
> levels of colour. BTW red/green does not mean I cannot see red and/or
> green at all. The particular colour combinations that affect me are
> bright red on bright green (#f00 on #0f0). A colleague once wore a
> green shirt with red pinstripes and whilst most people found it
> garish, I fell off table I was perched on! Bright yellow or green on
> purple is similar. White on yellow (or vice versa) is pretty much
> invisible as is green on blue. Similar shades of red green or blue
> next to each other are difficult to distinguish as are mid-shaeds on
> black. The best example I can give you is to imagine a barcode and you
> eyes keep focussing between the white and black stripes alternately.
> The result is a kind of vertigo which is what makes me pass out.
> Traffic lights are not an issue because there is significant gap
> between the lights and their order never changes.
>
> But as I said, that's just me - different colours affect different
> people. How do you know that what you see as bright red is the *same*
> colour everybody else sees? All you know is that you can identify it
> as such with the same regularity as they can - I can't. Playing
> snooker is a nightmare - once the brown completely disappeared and I
> had to get opponent to hold his finger over the ball.
>

I usually take a snapshot of a website and then make it monochrome. To
test for general contrast.

Previously I used this website to test colour schemes:
http://juicystudio.com/services/luminositycontrastratio.php

But was told by an accessibility expert, that too much contrast is
also not good, for those suffering from Keratoconus (Corneal
Dystrophia) and Dyslexia.

So I've began trying to find a middle ground really. My latest website
being more "pastel"

There is one website that might be unfriendly to you - not sure. So
here it is: http://www.whitelightproduction.com

In fact it is a rewrite from a previous version which was much darker
and sombre they used an indigo font over a black background. So I've
changed the colour scheme to something brighter / hopefully more
legible.

>> Also what kind of features would help you navigate such sites better?
>
> The colours I've listed will probably seem a bad idea to put on a
> website but quite a few sites will use mid blue on black and that's
> hard to see. Contrast is the key but there's still no need to go to
> entire hi-visibility (yellow on black).
>
> http://www.vischeck.com/vischeck/
> This site has some info on colour-blidnness including depictions ofn
> what things look like to colour-blind people. Of course I can't tell
> you how accurate they are because I can't see the original one
> properly! For example on this page
> http://www.vischeck.com/info/wade.php, the two strawberry photos are
> almost identical to me (the right one is slightly greyer) so I guess
> that's pretty accurate, but on other pages there's a greater
> difference.
>
>> I've been thinking a while about implementing stylesheet switchers and
>> so on. But prefer not to implement things without prior experience or
>> feedback.
>
> Good browsers include stylesheet switching these days. I prefer not to
> include things like text-size buttons on my sites. That will mean the
> user only views your site in a different size etc. I think it's a
> better policy to include information on setting your browser prefs so
> that all sites are viewed at your preference. Sometimes within those I
> will include links to switch the stylesheet there and then but the
> emphasis should be on helping people use the tools within their
> browser IYAM.
>

I'm definitely going to research more into stylesheets-switchers,
incorporate those into future projects.

Also look forward to purchasing those Perl books. They will be my next read.

thanks all for the tips, recommendations and help. Much appreciated

HG



-- 
SEO Mastery
http://www.alliancetec.com
-- 
Gllug mailing list  -  Gllug at gllug.org.uk
http://lists.gllug.org.uk/mailman/listinfo/gllug