- Success Criterion 1.4.1
- Conformance level A
Calendar Availability Shown Only Through Colored Cells
1.4.1 — Use of Color
Scenario
Setting
A professional networking site's profile editor
What’s wrong
Calendar availability shown only via colored cells.
Example
This shows up on a professional networking site's profile editor: calendar availability shown only via colored cells.
Why it matters
People with color-vision deficiency, low vision, or constrained viewing conditions such as strong glare. Here, on a professional networking site's profile editor, the result is they can't perceive the control's boundary or state.
How to test
View a calendar's available/unavailable days in grayscale: if color is the only distinguishing feature, it fails.
How to fix
A second visual cue (text, underline, icon, or pattern) must convey the information alongside color.
Outcome
After the fix, the same visitor to a professional networking site's profile editor can now read the text clearly against its background.
Who is affected
People with color-vision deficiency, low vision, or constrained viewing conditions such as strong glare.
Learn more
- Understanding Understanding document (opens in a new tab)
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