Audits foreground/background color pairs for WCAG 2.x contrast (AA and AAA for normal and large text), reports ratios and pass/fail, and notes color-blindness risks. Use when checking UI palettes, design tokens, or asking "is this gray-on-white readable?". Includes a stdlib Python contrast checker with --self-test.
Create a feature testing page design for Enterprise WeChat/DingTalk focusing on address book management, calendar/schedule management, and message sending/receiving. The design should be user-friendly, sleek, and have a technological appeal.
