VI. How To?
6.1. Understanding the Disability
Web Accessibility is a complex concept; there is no ready-to-implement solution for it. Most of the time, the solutions implemented will depends: on the targeted disabilities or difficulties, on the target audience of the website, and on the time available for the implementation.
When the difficulties to be addressed have been identified, the most important will be to understand exactly what these difficulties are, where do they come from, why do they happen, what is causing them... Once the problem is identified, a logical solution will generally arise from itself.
The example of colour-blindness is certainly the most telling: it is indeed difficult for someone who can see colours well to evaluate the level of contrast between two colours, figure 4.7 shows that very different colours may be perceived as one by colour-blind people, but with the help of tools like Color Oracle it is easier for the developer to understand how his or her page will be viewed; the choice of more "accessible" colours is thus made simpler.