Multiply that by the number of customers or potential customers who use your website or application. Let’s estimate that 10% of the world population would benefit from designs that are easier to see. Over the age of 40, most everyone will find that they need reading glasses or bifocals to clearly see small objects or text, a condition caused by the natural aging process, called presbyopia.Worldwide, the fastest-growing population is 60 years of age and older.Low-vision conditions increase with age, and half of people over the age of 50 have some degree of low-vision condition.7 to 12% of men have some form of color-vision deficiency (color blindness), and less than 1% of women do.About 4% of the population have low vision, whereas 0.6% are blind.15% of the world’s population have some form of disability, which includes conditions that affect seeing, hearing, motor abilities and cognitive abilities.Let’s estimate how many people could benefit from designs with sufficient color contrast by reviewing the statistics: Website analytics do not reveal this information. Who benefits from designs that have sufficient contrast? Quoting from the WCAG’s page: The 4.5:1 ratio is used in this provision to account for the loss in contrast that results from moderately low visual acuity, congenital or acquired color deficiencies, or the loss of contrast sensitivity that typically accompanies aging.Īs an accessibility consultant, I’m often asked how many people with disabilities use our products. Our goal is to make sure that all visual designs meet the minimum color-contrast ratio for normal and large text on a background, as described in the WCAG 2.0, Level AA, “ Contrast (Minimum): Understanding Success Criterion 1.4.3.” I’ll share the strategies, tips and tools that I use to help our teams deliver designs that most people can see and use without having to customize the experiences. I created our “Designers’ Accessibility Checklist,” and I will cover one of the most impactful guidelines on the checklist in this article: making sure that there is sufficient color contrast for all content. Color Theory for Designers, Part 1: The Meaning of Color.
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