A shared conversation with the Vektos chat, read-only. Its numbers are the database's on Nov 10, 01:42 (UTC).
Why does low color contrast matter, and which WCAG criterion is it?
Found 1 passage for WCAG 1.4.3.
Found 3 passages.
The rule color-contrast maps to WCAG 2.2 success criterion 1.4.3 Contrast (Minimum), a Level AA requirement. It says text and images of text need a contrast ratio of at least 4.5:1 against their background. Large text (roughly 18 point, or 14 point bold) needs at least 3:1. Logotypes, purely decorative content, and inactive interface components are exempt 1. The reason it matters is that text with weak contrast against its background is hard to read for people with low vision, and the European Accessibility Act names this directly. Among its indicative examples, it lists allowing additional contrast in foreground images so that persons who have low vision can see them 2. It also requires user interfaces to allow flexible contrast for users with disabilities 3.
[Understanding Contrast (Minimum)](https://www.w3.org/WAI/WCAG22/Understanding/contrast-minimum.html) \|\ [How to Meet Contrast (Minimum)](https://www.w3.org/WAI/WCAG22/quickref/#contrast-minimum) (Level AA) The visual presentation of text and images of text has a contrast ratio of at least 4.5:1, except for the following: Large Text Large-scale text and images of large-scale text have a contrast ratio of at least 3:1; Incidental Text or images of text that are part of an inactive user interface component, that are pure decoration, that are not visible to anyone, or that are part of a picture that contains significant other visual content, have no contrast requirement. Logotypes Text that is part of a logo or brand name has no contrast requirement.
(e) When a computer gives an error signal, providing a written text or an image indicating the error, so as to allow deaf persons to apprehend that an error is occurring. (f) Allowing for additional contrast in foreground images so that persons who have low vision can see them. (g) Allowing the user of a telephone to select the volume of the sound and reduce the interference with hearing aids so that persons who are hard of hearing can use the telephone. (h) Making touch screen buttons bigger and well separated so that persons with tremor can press them. (i) Ensuring that buttons to be pressed do not require much force so that persons who have motor impairments can use them. (j) Avoiding flickering images so that persons who get seizures are not at risk. (k) Allowing the use of headphones when spoken information is provided by automated teller machines. (l) As an alternative to fingerpri…
2. User interface and functionality design: The product, including its user interface, shall contain features, elements and functions, that allow persons with disabilities to access, perceive, operate, understand and control the product by ensuring that: (a) when the product provides for communication, including interpersonal communication, operation, information, control and orientation, it shall do so via more than one sensory channel; this shall include providing alternatives to vision, auditory, speech and tactile elements; (b) when the product uses speech it shall provide alternatives to speech and vocal input for communication, operation control and orientation; (c) when the product uses visual elements it shall provide for flexible magnification, brightness and contrast for communication, information and operation, as well as ensure interoperability with programmes and assistive d…
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