2.1.2 Text Contrast
As mentioned in the [Luminance Overall] section, some people need
low luminance, especially for backgrounds. Some people who need low
luminance for backgrounds also need low luminance overall and thus need
low luminance text.
Other people need high contrast between text and background,
including many older people who lose contrast sensitivity from ageing.
Some read better with dark text on light background.
For some people, common color combinations or colors from a limited
color palette work fine, for example, black text on white background or
the inverse with white text on black background. Other people need to
select more specific background and text colors. For example, people who
need low luminance overall, need to select the specific background and
text colors that provide sufficient contrast for them yet not too high
luminance. Readable and optimal color combinations differs vastly among
individuals and can even vary for one individual depending on conditions
such as fatigue and lighting.
[images of color example color settings, e.g., middle of css paper
User Requirement:
Users can set the background color and the text color from the full color spectrum.
LVTF notes
Related issues: Text in images – relates to other aspects of changing text, too, e.g., size, family, leading, etc.
UAAG 1.4 Provide text configuration
Understanding WCAG 1.4.6 Contrast (Enhanced): The visual presentation of text and images of text has a contrast ratio of at least 7:1…
"Therefore, in the recommendation, the contrast is calculated in
such a way that color is not a key factor so that people who have a
color vision deficit will also have adequate contrast between the text
and the background."Understanding WCAG 1.4.6
So we don't need to explicitly include colorblindness.
Source: [Erich UC-3], [Laura UC-8], [Laura UC-9], [Wayne UC-2], TAdER User Experiences ("I really need to be able to set the colours myself, presets don't work. Someone else's idea is useless.")
''comment'': perhaps this needs to be broader.
Foreground/background are two elements. There may be many other elements
on the page with color that needs to be adjusted.
Users can set the background color and the text color from the full color spectrum on all elements.{jim}