Too many websites ignore accessibility. But the ability to let people with visual or other constraints (like people using iPhones who can’t see Flash) certainly notice when they can’t use a website. The upshot: they never return.
Here are three sites you can use to help make it easier for people to use your site:
Colour Contrast Check
“The Colour Contrast Check Tool allows to specify a foreground and a background colour and determine if they provide enough of a contrast “when viewed by someone having color deficits or when viewed on a black and white screen”
“Rather than providing a complex technical report, WAVE shows the original web page with embedded icons and indicators that reveal the accessibility of that page.”
Browsershots makes screenshots of your web design in different browsers.