Free WCAG Color Contrast Checker
Check HEX text and background contrast for WCAG AA and AAA. 処理はすべてブラウザ内。アップロードなしでファイルはこの端末から出ません。
The contrast checker compares two HEX colors and reports the WCAG contrast ratio, including swatches taken from a palette.
Large text can pass at a lower ratio than body text. Check the size you will actually use.
Questions
What ratio should body text hit?
WCAG AA asks for at least 4.5:1 for normal text and 3:1 for large text.
Can I start from a photo’s colors?
Yes. Extract a palette on the same page, then check a pair of those swatches.