Contrast Simulator
Simulate or calculate an accessibility scenario locally for inspection and testing.
Local accessibility utility. Analysis runs in your browser; no accessibility claim is sent to an external service.
- Tool
- Contrast simulator
- Mode
- Local / deterministic
Accessible color preview
Contrast ratio: 21.00:1
WCAG AA normal text (4.5:1): PASS
WCAG AA large text (3:1): PASS
WCAG AAA normal text (7:1): PASS
Contrast SIMULATOR Foreground: #000000 Background: #ffffff Contrast ratio: 21.00:1 WCAG AA normal text (4.5:1): PASS WCAG AA large text (3:1): PASS WCAG AAA normal text (7:1): PASS Tip: check the actual text size and UI context before shipping.
What this tool does
Simulate or calculate an accessibility scenario locally for inspection and testing. Results can be copied or downloaded from this page.
Related tools
- Contrast GeneratorGenerate an accessibility-oriented starting point, template, or recommendation locally.
- Contrast HelperProvide practical accessibility guidance from the supplied values or markup.
- Contrast PreviewPreview an accessibility result locally before implementation.
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- Color Blindness GeneratorGenerate an accessibility-oriented starting point, template, or recommendation locally.
- Color Blindness HelperProvide practical accessibility guidance from the supplied values or markup.