#26037
Can Color-Blind Users See Your Site?
Information that will help you to create more readable Web sites.
Hess, Robert. Microsoft (2000). Design>Web Design>Accessibility>Color
#21120
You might do a lot of usability testing on your web site but you still might lose up to 10% of your audience because of some simple mistakes with colors. Specifically, your web site may be designed in a way that doesn't work well for people with colorblindness. Generally the fix is quite simple: be sure to provide excellent contrast between your various web page elements.
Follansbee, Todd. WebWord (2001). Design>Web Design>Accessibility>Color
#19320
Colour is used in interface design for a variety of purposes. Not only can colour convey meaning or highlight content, it is also an important part of corporate identity and branding. Where would the Coca Cola brand be without its distinctive red and white livery? All well and good, but the reality is that the use of colour can cause more problems than it solves. Interface designers must treat colour with caution for a variety of reasons - most importantly the huge variety of ways in which any given colour can be perceived. It is well known that older users and those with colour-deficit vision may have difficulty in perceiving certain colours. Different monitors may be poor at maintaining colours the same across displays, and of course many users are still working on black and white displays. In this environment, poor use of colour may mean that text is hard to read, eyestrain occurs, and users become frustrated. With this in mind, designers should consider the following guidelines relating to the use of colour in interface design.
Gaine, Frank. Frontend Infocentre (2000). Design>Web Design>Accessibility>Color
#20662
Recently, I was surprised to learn that about 8 percent of men and 0.5 percent of women have some form of color blindness. For some Web sites that could translate to 1 in 12 visitors. That's a larger proportion of visitors than some other groups I consider when designing Web sites. The ratio of visitors viewing the Web with only 256 colors or a 640x480 pixel screen is usually less than 5 percent these days. Now include cross-browser support, older browsers, style sheets, and JavaScript in the mix. If you consider those issues when you design Web sites, you should consider your color-blind visitors, as well.
Newman, Chuck. New Architect (2000). Design>Web Design>Accessibility>Color
#22953
Safe Web Colours For Colour-Deficient Vision
Colour is increasingly used these days to help convey information. When one in twelve men have some measurable degree of colour vision deficiency, the use of certain colours in certain ways can cause difficulty when navigating web pages or software, and even total illegibility in some cases. The key issue is to know when you are using colours which some people will not be able to differentiate - because that (for them) removes the benefit of using colour for visual cues. Colour scientists have long known which colours are confused by colour blind people, but this tends to be expressed in a way difficult for designers to utilise.
BT Group (2004). Articles>Web Design>Accessibility>Color
