Color and contrast
- All 21 themes are verified on every build: 525 automated checks for text (4.5:1) and controls/focus (3:1), WCAG 1.4.3 and 1.4.11.
- Input and switch borders use a dedicated control color that meets 3:1 against the page.
- A high-contrast theme, applied automatically when the OS asks for more contrast (prefers-contrast: more).
- Windows High Contrast / forced-colors mode keeps borders, selection and focus visible.