Regex Tester & Validator
Test, validate and match regular expressions
Test, validate and match regular expressions
This regex matches common CSS color formats: hexadecimal codes (with # or 0x prefix, 3 or 6 digits) and RGB/HSL functional notations, including their alpha variants (rgba/hsla). It is useful for extracting or validating color values in CSS, HTML, or JavaScript strings, and for syntax highlighting or preprocessing.