APCA contrast tester
Mistake: Treating a result as valid outside the described scope.
Fix: Compare text and background; APCA and WCAG 2 use different methods and must be read separately.
Archive · Free
APCA contrast tester
Measure perceptual contrast between text and background colors in APCA Lc. This is not a WCAG 2 pass/fail test.
This tool is archived. Recheck its method and dated data before use.
01Enter your values
Runs in your browserRuns offline in your browser. Once the page and required files have loaded, processing needs no internet.
02APCA contrast tester
Runs in your browser
How it works
Measure perceptual contrast between text and background colors in APCA Lc. This is not a WCAG 2 pass/fail test.
APCA-W3 0.1.9 · Lc
Runs in your browser
Discovery source
Your data stays yours
Inputs are processed on this page and are never sent to a server.
About this tool
Use tool ↑Measure perceptual contrast between text and background colors in APCA Lc. This is not a WCAG 2 pass/fail test.
Compare text and background; APCA and WCAG 2 use different methods and must be read separately.
- Enter your values
- Text color
- Background
- Calculation method
APCA-W3 0.1.9 · Lc
- Example scenario · Result
102.72192853 Lc
Calculation method
- Compare text and background; APCA and WCAG 2 use different methods and must be read separately.
APCA-W3 0.1.9 · Lc
APCA contrast tester
- Text color
- #182239
- Background
- #ffffff
Result
102.72192853 Lc
Frequently asked questions
How should I interpret the result?
Compare text and background; APCA and WCAG 2 use different methods and must be read separately.
Where does my data go?
Calculations run on your device. Form inputs are not sent to a server.
Terms and definitions
Enter your values
- Text color
Compare text and background; APCA and WCAG 2 use different methods and must be read separately.
Choose the actual color being compared or used.
- Background
Compare text and background; APCA and WCAG 2 use different methods and must be read separately.
Choose the actual color being compared or used.
Result
- Result
Compare text and background; APCA and WCAG 2 use different methods and must be read separately.
Calculated from your entries using the method below.
- Compare
Compare text and background; APCA and WCAG 2 use different methods and must be read separately.
Calculated from your entries using the method below.
Common mistakes and quick fixes
Limits and key assumptions
- Compare text and background; APCA and WCAG 2 use different methods and must be read separately.