The following features Apple primarily designed to assist people with visual impairments. These features help blind and low-vision users, but some configurations can also be helpful to people with learning difficulties, color deficiencies, low literacy, and others. Visual impairments can include long-sightedness, low vision, color impairments, blindness, and others. Many of these features may also benefit those with cognitive impairments, attention disorders, or low literacy or people who prefer their text a little larger or their colors a little more muted. Some people enable the grayscale color filter just because it looks cool. Vision considerations make up the largest group of accessibility features currently available on iOS.
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Remember also that if you are changing background or text color in this way, each possible color combination should pass the WGAG guideline of at least 4.5:1 contrast ratio.
© 2020 Rob Whitaker
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Whitaker, R. (2020). iOS Accessibility Features – Vision. In: Developing Inclusive Mobile Apps. Apress, Berkeley, CA. https://doi.org/10.1007/978-1-4842-5814-9_8
Publisher Name: Apress, Berkeley, CA
Print ISBN: 978-1-4842-5813-2
Online ISBN: 978-1-4842-5814-9