Regex Tester & Validator
Test, validate and match regular expressions
Test, validate and match regular expressions
Validates hexadecimal color codes in either 3-digit (#fff) or 6-digit (#ff0000) format, with an optional leading hash symbol. The case-insensitive flag allows both uppercase and lowercase letters (a-f, A-F). Commonly used for validating CSS color values, color picker form inputs, and theme configuration fields in web applications.