Adobe® Illustrator® CC software provides support for individuals who want to create accessible web content. With Illustrator, users can proof images with Color Universal Design (CUD) to help ensure that graphical information is conveyed accurately to people with various types of color vision impairment, including people with color blindness. Illustrator can be configured to always add an alt attribute to image elements. Illustrator also enables users to specify alternative text descriptions for image slices.
Illustrator CC is the definitive solution for professional web vector graphics and artwork creation. You can use Illustrator to create and edit graphics and optimize images in a professional environment.
Illustrator integrates with other Adobe products such as Dreamweaver®, Flash® Professional, and Fireworks®, as well as your other favorite graphics applications and HTML editors, to provide a truly integrated web solution. You can easily export Illustrator graphics to other Adobe authoring applications, such as Dreamweaver, or directly export a sliced image to HTML.
Illustrator supports CUD through its soft-proofing features, which can simulate color blindness. This feature allows the designer to see what the image will look like for people with different types of color blindness, such as protanopia and deuteranopia. Color blindness simulation makes it easier to create accessible signage and other artwork.
CUD helps ensure that graphical information is conveyed accurately to people with various types of color vision impairment, including people with color blindness. Several countries have guidelines that require CUD-compliant graphics in public spaces.
The most common types of color blindness are protanopia (blindness to red) and deuteranopia (blindness to green). About one-third of color blind people are completely blind to red or green; most of the remainder have milder forms of color blindness.
In the figure below, the color wheel labeled A is the original image. The color wheel labeled B is a proof of how an individual with protanopia sees the original. The color wheel labeled C indicates a color combination that is perceivable to the greatest number of individuals.
To determine whether a document is CUD-compliant, do the following in Illustrator:
If objects are difficult to distinguish in color-blind proofs, adjust the design by doing any of the following:
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If you have questions or comments or want to get involved with Adobe’s accessibility efforts, contact us. We welcome your feedback.